Broke up but didn’t want to

What happened is that I was with a person who (probably) has bpd. Their illness causes abandonment issues,HUGE ones,and last year they completely crashed out when I got close to an old friend of mine. After that I got scared to make friends again,and there was also the fact that every time I felt bad (mostly cuz of my depression) they were affected A LOT,which ended up in me taking care of them more then myself.
So two weeks ago,I broke up with them. I didn’t want to tbh but I thought it was for the best and now I deeply regret it because I love them,I love them more than anything. I was at the mental hospital when I broke up with them so in two weeks my mental health really improved and I now think I can handle their mental health. But I’m just scared to get back with them and find out that no I can’t handle that. Idk what to do.
If y’all want to tell me what you think of this,go ahead cuz I’m fucking lost