<human>: I'm looking for some outside perspective and advice from the sages on /r/Relationships on when it's time to give up.

For background, I've been dating my SO for going on 7 years, and we've been living together for about 5. We had some periods where things were going pretty well, but there have always been issues. Over the summer, we were essentially broken up for about a week because the problems we've had for a long time (senses of humor, I'm laid back and she's more wound up, methods of coping, not too many same interests, feeding each other's bad habits, communication issues, etc.) haven't really gotten much better. We talked it over and decided to give things another shot, but since a good way before then I haven't really felt anything truly romantic towards her.

The problem is that I've had issues for a while not really feeling happy or interested in a lot of things (depression is fun), and it's hard to tell how much of it is that general apathy versus just not feeling like we're working as a couple anymore. I still like being around her generally, and we work very well as friends, but I'm at a loss at this point. I don't know if I should just trust that my gut instinct is right and cut things off or if it might get better once we improve our individual situations. All I know is that I feel terrible thinking about ending things since she's been feeling a lot better recently and has always been extremely supportive.

Can you succinctly summarize the text in 1-3 sentences?
<bot>: Issues in relationship for a long time, individual problems that might be the main reason for this, when and how to decide things won't get better and it's time to move on?