Where do I even start

So I was dating this guy for a month don't think u call it dating but fine. After 6 months we started dating again, stupid I know. During the six months we became super close and now talk about anything thing, like the girls he finds cute or hot, the guys I find hot, his ex's, my ex's and what we'll do after we break up. I think I love him and normally that wouldn't be the problem I mean I am dating him but here the thing I'm pretty sure we'll break up in a month or so. Any advice on what I should do ?