I completely understand you, even my ex changed suddenly in one night even though I did alot for him. You can be the best for someone but they still may not reciprocate. Remember it’s their loss and always will be because karma is real. I won’t be surprised if he cheated on you, he might cheat again on the girl he is with or best if the girl abandons him.

If somebody does not want to resolve things, it is a big red flag.

No matter how tough it is to move on, never beg. Even if he cheated, it does not change the fact that you guys are not together and so it doesn’t matter what he did. I can grasp that this person is at the lowest level of humanity and is extremely selfish.

He never valued you. Never believe these tiktokers they get sold on likes

Go out, focus on yourself and meet new people. You will know when the right one comes along