Selfish ma to be honest. Ts only think about his own feelings but never think of his gf or ex gf feeling. Imagine u in her position u like a girl so much and she tell u she confuse choosing u between another guy. How u feel? U guys give him respect?

Some event as such mght cause a very bad chain of events like the ex gf mind just snap never to trust guy because her previous relationship failed. She go around cheating guys and do the same to prevent herself ever to get hurt.

It shows ts is not a creative person. He is boring and u meet another gal more fun he switch .

Relation ship

See the word relation? Its require 2 persons to create fun stuff, events, and etc not u didn't do anything and say boring then give up. It's totally your fault except everything u do your gf or ex gf say no different story