Sorry, long post, here! But I wanted to offer what has helped me.
I absolutely have these days, too, more often than not. It is one hundred percent up to you whether the romantic or platonic relationship is something you want to keep. I know you said you've tried to look at it rationally, but I have to look at it logically and to be completely honest with myself. With friends, I have gone both ways. I lose that connection to them and then realize, logically, that I never really valued our friendship anyway, that I maintained it out of some sense of obligation or just because I was plodding along without considering it. Or, I realize that I really do value them, I just need some space. The long term friends I have are all understanding of the fact that I don't always want to be around them.
With my husband, I realize that I know I loved my husband. It may have been weeks ago, but I know in my mind that I loved him. That intimate feeling returns after a time, which helps me make this connection, but with others it didn't and I knew it was time to move on. It has gotten better (less frequently and infinitely easier to deal with) since I've told him and let him know that on certain days or longer, I just don't feel connected, sometimes I feel irrationally angry at him and irritated by his presence, and it's difficult and physically painful for me to be too near him, so I need both physical and mental space. I have a room that I can go hole up in with my laptop or a book and my dog, or if he's holed up in his office, I can roam the house and retreat when needed. Thankfully, my husband has been (almost mythical-ly) understanding about all of this and gives me space.
If you do want to pursue a relationship of any kind, you don't have to give every detail of what you go through, or if you already have opened up to some extent: perhaps make your need for space known. In this case, it's really important to make it very clear that you do not want to end the relationship. It doesn't have to be a passionate plea. Just a "Hey, I just need you to know that I value our relationship a lot. I absolutely do not want this to end and it's important to me that you stay in my life as you are right now (friend or ____?). I need some time to recharge, though, and that might mean that we keep communication to a minimum for a week/weeks/what-have-you or so. You've done nothing wrong, it's just something I need."
I know it's such a worn out phrase, but the people who matter, the ones who deserve to be in your life, will be understanding. My marriage would not have lasted, or even got to marriage, if my husband had not been understanding of my need for space (I didn't share my full reasons until after marriage).
No matter the case, as you've seen, you are far from alone in this feeling. I imagine there is a rainbow of ways that people cope. I hope you can find yours and continue on to healthy relationships.
I absolutely have these days, too, more often than not. It is one hundred percent up to you whether the romantic or platonic relationship is something you want to keep. I know you said you've tried to look at it rationally, but I have to look at it logically and to be completely honest with myself. With friends, I have gone both ways. I lose that connection to them and then realize, logically, that I never really valued our friendship anyway, that I maintained it out of some sense of obligation or just because I was plodding along without considering it. Or, I realize that I really do value them, I just need some space. The long term friends I have are all understanding of the fact that I don't always want to be around them.
With my husband, I realize that I know I loved my husband. It may have been weeks ago, but I know in my mind that I loved him. That intimate feeling returns after a time, which helps me make this connection, but with others it didn't and I knew it was time to move on. It has gotten better (less frequently and infinitely easier to deal with) since I've told him and let him know that on certain days or longer, I just don't feel connected, sometimes I feel irrationally angry at him and irritated by his presence, and it's difficult and physically painful for me to be too near him, so I need both physical and mental space. I have a room that I can go hole up in with my laptop or a book and my dog, or if he's holed up in his office, I can roam the house and retreat when needed. Thankfully, my husband has been (almost mythical-ly) understanding about all of this and gives me space.
If you do want to pursue a relationship of any kind, you don't have to give every detail of what you go through, or if you already have opened up to some extent: perhaps make your need for space known. In this case, it's really important to make it very clear that you do not want to end the relationship. It doesn't have to be a passionate plea. Just a "Hey, I just need you to know that I value our relationship a lot. I absolutely do not want this to end and it's important to me that you stay in my life as you are right now (friend or ____?). I need some time to recharge, though, and that might mean that we keep communication to a minimum for a week/weeks/what-have-you or so. You've done nothing wrong, it's just something I need."
I know it's such a worn out phrase, but the people who matter, the ones who deserve to be in your life, will be understanding. My marriage would not have lasted, or even got to marriage, if my husband had not been understanding of my need for space (I didn't share my full reasons until after marriage).
No matter the case, as you've seen, you are far from alone in this feeling. I imagine there is a rainbow of ways that people cope. I hope you can find yours and continue on to healthy relationships.