Can you or should you be friends with a guy who cheated on you?

umm...i wouldnt...once a cheater and a liar...always one...my bf and I just went thought shyt like this...he was snooping in my online accounts...and found me chatting to an ex..but the guy is like so far from me...and i dont want him anymore...but exs and opposite cant be friends unless one of them are gay...so i had to say it...but its true...to much ual tention