Wtf why won’t my heart move on?

I’m dating this new guy since me and my ex broke up but I don’t know how I feel about this new guy. We’ve been going on dates like once a week or every other week for 2 months and I though I would know by now wether or not I liked him or not. I don’t wanna string him along but I think I like him but I’m not sure. I don’t know if it’s because I still love my ex. I can’t see myself having a future with my ex though but I do still love him and think about him all the time. I broke up with him 4 months ago. I’m so confused with what to do and what’s going on with my love life. What do I do?