Stuck with his ID, have to meet up? Help.

When my nex and I broke up, I was a complete mess, blablabla (you know how it all goes).

I focused on my work, my mental health and my physical health. I started going to the gym again and over the course of the months, I met someone.

He came on super strongly, but I told him from the beginning that Im not looking for anything beyond a friendship. Well, he was sweet, kind, attentive, etc. I wasn’t super into him, but I began to like him (just a little). One thing led to another and I finally let myself explore that.

Nothing sexually actually happened (because I didn’t let it), but eventually I snooped on social media only to find out that he had a whole ass girlfriend the entire time.

He had initially said he didn’t have access to his ig (and because I didn’t have a reason to question that, I never checked). He gave me a ring for my bday, always wanted to call and text, made me feel pretty and like i mattered, and tbh it was nice to feel like that after being stonewalled for 4 years (by my nex). This dude mentioned having feelings for me, talked about the future, moving in, etc, etc.

Well, out of nowhere, he began getting distant. Just on a random Tuesday. I was patient, didn’t press, but on the 3rd day I confronted him and told him that if something had changed then it would be best to communicate that, because the silent treatment is just straight up abusive.

During the time he was ghosting, I began getting suspicious and checked his instagram. There was nothing, but his exes name came up as a suggested. I clicked on that, that’s where I found pictures of them together. It turns out , this dude had a girlfriend all along and was lying the entire time.

Back to me confronting him, he randomly ended it, and told me that he had too much going on in his life and he’s sorry to being distant, but he doesn’t want to drag me through this. I accepted it, and didn’t tell him about what I knew, because I guess I was still in denial.

Unfortunately, this dude had left his gym back with all of his documents in my car and I still had to return it. I made plans to meet him to return the bag, he delayed, acted confused, and eventually just blamed me for being “confusing” on the timing.

This is when things get crazy. I check on the girls story the next morning, and I had the confirmation I needed. They were together at a concert that day that he said we’d meet up to drop off the bag. My sister immediately let the ex know the dude is a cheater and I have not talked to him since.

NOW, he messaged me asking me if Monday works for me to drop off the bag. I haven’t responded and I’m stuck with it.

What do I do? I legally can’t keep the bag and I don’t want to. The bag has his wallet with all his IDS and credit cards. What do I do. I’m scared because I don’t know if he knows that my sister told his gf. I don’t want to see him,and I also don’t want to go out of my way for him.

Help.