To stay out not to stay, that is the question.

Ya'll, I need some advice. Am I just being a picky, rose-glasses wearing, standards too high kinda gal or does any of this have actual merit?

So my boyfriend (25) of over 2.5 years and I (21) have been going through a rough patch. That's lasted months now (and if I'm totally honest, was something we'd go through every few months for the past 2 years or so). It feels entirely one sided from my side but basically, I go through these periods of just utterly questioning the whole relationship and why I'm with him.

I feel that a lot of our core interests don't really line up, and he doesn't take particular interest in my hobbies that are different to his. I think it's important and try keep up to date with current world issues like BLM, GBV, conservation issues and trying to live a green life, but he has said that he doesn't really care about that sort of thing. He enjoys gaming, magic the gathering, follows some football teams, all of which I'm also not very interested in (but I've tried different games with him and played MtG before, it just never stuck). If it weren't for D&D and other rpgs, we wouldn't have much in common.

Another thing is that I've been trying hard to lose weight. I picked up around 15kg in the first 1.5 years of our relationship and have been trying to lose that and get back to a healthier weight for the last year. He has commented on how I'm looking sexier which was nice. However, for the entirety of our relationship he has been putting himself down about his weight but has never taken any lasting action to lose anything. If I'm being honest, he is overweight and needs to lose. He orders ubereats regularly, doesn't go out the house often (also didn't really before Covid), and doesn't drink much water (which is the easiest way to lose weight). He generally doesn't put much effort into his appearance.

This man has been with me through 2 sexual assaults and helped me get over my ex bf who was very mentally and emotionally toxic towards me. He's a kind, trustworthy person who's funny, helpful and creative. I used to see a future where I could marry him (in like 5 years time I'm in no rush) but not anymore. It just feels stale and uncomfortable.

We share almost all our different friendship circles so a breakup would be pretty messy. After so long, I don't know whether he would be okay with staying friends any more which is what he originally said would happen if we ever did break up. Everything just feels weird and I don't know whether it's just all the stress from covid and having to stay at home (we don't live together so it's been a strain) and that's making me feel distant from him, since I tend to push people away when I'm stressed, or whether it's just a relationship that's coming to an end.

I'd love any input <3 There are also other issues and such, but this has turned into an essay already! Any advice would be welcome :)