I’m just immature
The simple truth of it is, I’m selfish, I’m scared to feel anything ‘real’ and I’m still a child at heart.
I am a serial cheater, every girlfriend I’ve ever had (except my first serious one who cheated on me) I have cheated on. Most of these girls I cheated with have gone on to be my long term girlfriends, until it got serious enough or boring enough that I sought excitement elsewhere.