Kind of in a funk

I’m dating this guy we just made it offical again this morning but he’s been here for the last two weeks. we dated at the end of last year for three months and then he broke up with me out of the blue. throughout the six months that we were broken up we still kept in contact and we’ve basically been together for this entire month and i just get insecure sometimes because i’m scared he’s gonna leave again and i know that i shouldn’t dwell on the past but this guy is literally my best friend and has been since before we were dating and i just get scared sometimes and i have a lot going on too and he’s there for me but i don’t know how to get myself out of my own head and it just sucks but i’m out of a job right now because of covid so he’s been financially supporting me and he basically lives with me and i don’t know why i can’t get over my own insecurities and just be happy but there’s a lot more stuff going on personally too and i think i might just be questioning because this is the most stable and healthy thing going on in my life right now. and i don’t really have friends so that’s why i’m posting on here. i’m sorry to rant i just dont know what to do to help myself.