who should I choose

Okay i have been see I'm ex again and if we would try to work it out it would be our third time he says that he still loves me and that he never stop but I don't believe him i told him that and that he needs to prove it to me and he know how to but doesn't also we had sex couple time and after he's rude and ignore me and doesn't respond to my texts day and half goes by and he will back me back and I am always the one who has to message first and he knows how to prove it to me but he doenst and then there this other guy he's my every first ex boyfriend friend and he basically asked me out on a date ( i would tell a background story but the is no storie) what should I do be with a guys who I had a past with or a new one guys or should I forget about them both