Ex Boyfriend troubles?

I had broken up with my boyfriend in April last year a month after I found out that I was moving to another province and after that I was kinda being distant with him and thought it would be best to just break it off. We are texting and calling each other pretty much every day now since then (after maybe a 2 month break from each other) and back in October I feel like everything is back to normal between us. We still flirt and talk about a possible future together but we're still ex's. I want to ask him if he wants to get back together with me but I'm not sure how to do it. I don't want to seem rude because I was the one who broke it off with him in the first place but I really do like him and I feel like the space we had appart really brought us back together. I'm wondering how I can bring the idea of us dating again to him? Please help!!