If a guy tried to cheat on his former gf w you but now they've broken up and he shows that he just wants to be w you should you trust him and go forward w the relationship or will he end up cheating?

Answer 1

Let me try and explain this to you mathematically.

Consider yourself as "A". your boy friend as "B" and the his ex-girlfriend as "C"

It is pretty obvious that A and C both have things that B is attracted to. However B often looses interest in A or C after a certain period of time, therefore there is a good chance that B will leave either A or C if someone else came along with the features of both A and C, namely "D".

In other words, your b.f might leave you soon for his ex once he tires of you or will leave both of you for the next girl who comes along with characteristics of both you and his ex-girlfriend.