Conflicting feelings. Can't make a decision

LegacyUser

Going unreg for this. I'm feeling awful about this situation.
Been seeing a guy for the last few weeks. There's been a bit of a spark there for a while and we've been friends for a while before we expressed our mutual feelings for one another. We get on great when we're on our own but when we're with our group of mutual friends, he's just so f****** negative. He complains a lot, doesn't look after his appearance (looks scruffy, etc.) and generally annoys people, myself included.
He's a different person when we're alone together - charming, funny, kind, etc. I don't think he has much past relationship experience and I feel we're somewhat far apart where that's concerned.
We've slept together and have been spending a lot of time together which has been enjoyable. I have a pattern of screwing up relationships for myself. I don't know whether to give this a go or not. He's willing. I just feel very conflicted about it all. Really like him, but feel very reluctant too.
Any advice would be appreciated.

IrishEyes19

my biggest concern would be how does he treat you. Is he rude and uncaring to you when you are out with other people too. If so, that is an issue. If his actions towards you dont change either way, then its his issue not yours.

Overheal

annoying how?