What would you do?

I last saw my ex 3 months ago, and he last messaged me a couple days ago basically cause he didn’t speak to me for a couple weeks and then all he said was he is certain with his decision in breaking up with me. Anyway, that was a couple days ago I before I let him respond I blocked him. Since I’ve had this guy who messages me basically trying to get with me and yes he is my type but I’m worried cause I do still love my ex and wish he could come back but also feel I should try with someone else ? Am I ready ? I don’t even know right now. I don’t want the new guy to hurt me because incase he does just want to have a quick thing but I also feel I will hurt him if we did do something but then my ex came back I’d leave him. I’m so stuck I just want something real and a real relationship What would you do?