[UPDATE] My (22m) girlfriend's (24f) ex (23m) wants to meet up with her for closure

Previous post: https://old.reddit.com/r/relationships/comments/8gszes
To summarize, this is my first relationship and my girlfriend met her ex at a party. We have been together for 6 months and she introduced us. He invited her to coffee with another mutual friend and she went. Then he text her asking to meet up to talk so he could have closure over their relationship.
I told my girlfriend that she should do whatever she felt comfortable doing and that I supported her. I asked if she thought he might be trying to rekindle things and she said no. I told her that if she wanted I could bring my laptop to the same cafe and study from there, so that if she felt uncomfortable I could come and diffuse things. She said she didn't think that was necessary, but that I could if I wanted to. I decided not to because I don't want to be in a relationship where I feel like I can't trust her.
She met up with him and apparently his issue was that being cheated on by his recent ex had led to a crisis of self-esteem. In their relationship, he had felt like he wasn't good enough for her because she had a 'good girl' reputation and he had a past filled with women and he felt like he wasn't good enough which was one factor contributing to their break up. She said that he basically wanted confirmation from her that during their relationship, in her eyes, he was a person worth caring about, to try and combat his perspective that he wasn't. They talked for about an hour, and then they were joined by the mutual friend who he had invited (she didn't know that) and they all got food. He invited us both to a barbeque party him and his housemates are throwing next weekend. He sent me a facebook friend request and invited me to the facebook event this evening. My girlfriend came home and detailed the conversation to me. She said she thinks the two of us will get along well as we are quite similar and her ex liked me when we had met.
Guess I didn't have anything to worry about after all.
tl;dr: girlfriend met up with her ex. He wanted reassurance that he was a good person, as this belief had been shaken by his recent girlfriend cheating on him. He didn't try anything with her, and has invited us both to his house party next weekend.


Source.

No negro...to all of this. And y'all better not go to that damn party.