Is he over his ex? Advice

So me and my boyfriend have been together for 2 months but previously had a really strong friendship.

When I was his friend he didn’t tell me about how he was physically abused by his ex boyfriend and manipulated as well as being cheated on.

This relationship was a year or 2 ago but i can’t be sure if he’s over him but some things about his attitude towards his ex don’t match up:

1) He bumped into his ex by accident (both live in small town) after a heated confrontation where my boyfriend accused him of cheating and lying this ex of his slapped him in the face. Sometime next week he bumps into the same ex and that ex politely chats to him like nothing is wrong at all ! He reprociates politely and gives him his business card he even told me they might work together!!

2) When I jockingly said I’d beat up his ex he laughed nervously and got akward.

3) When we were friends he kept listening to really sad break up song about deeply loving a guy and being accepted by him which I invalidated (could be a coincidence I don’t know).

4) He has told me he lives in the past not the present.

Given those things why is he still friends with him? If my ex was abusive and disrespectful I would not even see them at all or speak to them but treat them with indifference! I don’t get why he’s so passive and can’t even stand up to him or walk away why is he still trying to be good to him when his ex has proven to be incapable of caring for him. He even admitted to loosing his virginity to him whilst together which could mean he is physically attached to him.

Despite that he asked me out first and sees me regularly demonstrating that he cares but I can’t help but be insecure that I like him too much and that he could come back to his old patterns.

Any advice would be greatly appreciated 💜

Kind Regards,
Milaya Detka :)