We can all sit here & analyze why he is doing what he is doing. The only person who truly knows the answer is him. Would he give you an honest reply if you were to ask?
You need to get his belongings back to him, that's a must. As long as you still have his stuff, he still has an excuse for contacting you.
I would agree to meet up with him not for a meal or even a drink, but just arrange to meet with him so you can pass on his stuff.
Tell him that you respect his decision to end the relationship, you don't agree with it but you respect the way he feels. Ask him not to contact you in the future unless he is looking for reconciliation.
What you are doing here is being honest. Mind games etc don't work, all that they achieve is pushing someone further away from you. You're making it clear how you feel, but your also making it clear that you aren't prepared to accept breadcrumbs. It's the whole loaf or nothing.
I'm a member of a relationship forum & I see this over & over again how people are hindered in their healing & moving on process because their ex is constantly getting in touch with them with nothing more than mere breadcrumbs. It's selfish & cruel.
Once you've met with him I would advice you to go NC (no contact). NC isn't a means for getting your ex back, it's for YOU, it gives you the space you need to heal & move on. If your ex doesn't want to get back with you, then hopefully he'll respect your decision & give you the space you need to heal & move on.