Like we were looking into movie times and a text came up from a girl, it was flirty and he knows I saw it. Naturally, I started acting distant and upset. He saw this and started being so nice, appreciative towards me.
why would he even bother treating me well if he's going to cheat on me? Like why care how I feel if you do that.
Flirting doesn't necessarily mean he'll cheat. Some people are naturally flirty, then there's others who have a fun personality but it comes across as flirtatious.
It's disrespectful towards you , and he should consider your feelings. Maybe he's being extra nice to show he cares about you , and you don't need to feel intimidated or vulnerable when he chats to other girls
Stand up for yourself, don't let him think for one second that behavior is acceptable. By staying with him and not letting him know he's doing you wrong, it will only make things worse for you. Trust in what you believe is right, if he cares about you he will agree.