Boy I’m seeing’s Ex

Right it’s a complicated story, but to put it briefly I’m speaking to this boy. We met up a few times over half term, went on dates and stuff happened if u get me. But we have been back in college for weeks and he hasn’t spoke to me in person at all. He messages me everyday, even when we are in college. But he won’t talk to me. I don’t know whether it’s because he’s embarrassed to be seen with me , whether he doesn’t like that most of my friends are boys ( he’s never seems to have any issues with that tho so I don’t think it’s that) or if maybe he doesn’t want his ex ( who he broke up with last summer) to see him with me. But regardless of why, I’m not making it better by not talking to him either. It’s childish tbh, we are off to uni hopefully next year and like honestly it’s just pathetic.

It’s got to the stage I’m getting nightmares about him getting back with his ex, or getting with someone else. Which is just plain weird. And I keep comparing myself to her, but I’ve never been the type of person to compare myself to others. I accept myself as I am, but I can’t help it. Like she’s skinny and tall. And I’m short and “ curvy” and I do weights and cross fit so that’s kinda my body type.

Like even seeing photos of her cause me to get all tight chested and self conscious, and I Start stressing about what would happen if he went back to her.

What do I do? ( I appreciate there’s probs 10000 typos)