I spent the weekend with my ex.

We met after a year and a half break up that screwed both of us and we still have feelings for one another but I'm not sure if trying a fresh star would be ideal... mostly because we would need to build trust from a bad experience but damn I get hard every time I see him and we have such a great connection on almost everything. I don't know what to do. I tried dating other guys, he did as well but it they just weren't him(good and bad included).Although I feel something for him It's not the same as it was but still better that any other guy I tried.Should we start being friends and see where it leads to or do nothing and forget about him?I'm confused, please help.