Any advice please

There's a guy I'm really into but I feel like he's losing interest. This is the point I usually bail and run, he's said in the past he likes me and all that shit but because of lockdown we can't meet. But for the past few days I think he's been a bit distant. Not replying as quick as he used to and not as keen on the conversation. I'm an over thinker but I think he's gone off me or going off me properly now. I dunno what to do. I've been shoved aside so many times in the past so I worry a lot. I try to back off but I don't wanna seem rude and I don't wanna completely ignore him but at the same time maybe it's best to call it quits? He's quite a cool guy and I'm not that great. I've put on loads of weight in quarantine too so I know he'll be put off if we did eventually meet. I'm just confused and don't know what to do anymore

Btw if it isn't obvious I have anxiety and it makes my mind run like mad