Weird situation..

So last year in August my bf proposed. It lasted about two months before I found out he was thinking about leaving me then I ended up moving out.. we technically weren't together for 3 days.. got back together and I ended up moving back in the beginning of December. Then of course I started feeling weird and getting depressed and moved out again mid January. We stayed together until he had this weird fucking dream and decided I may or may not be the one blah blah blah some other stuff happened, then he got over that once I just stopped talking to him all together, which lasted four days.. so now it's the end of March and we've been doing so well.. but he gave me my engagement ring back a few days ago and it made me soo happy.. But now for some reason for the past 24 hrs I've been having doubts. I love him but I don't want to go through the same stuff we went through before. So of course I'll stay with him if we continue to be happy but once I see the first signs of some shit hitting the fan I'm gonna want to be mentally prepared to just leave.

I guess I don't have any questions I just really needed to get that off my chest. And yes I know communication is key but I'm hoping this doubtful feeling will pass.