I find it odd, being HIV positive, that a guy would sleep with you but not consider you marriage material.
That seems generally counter-intuitive.
I can see where intimacy would be off the table. It would be for me should the roles be reversed. But if someone is willing to risk infection with sex...... than committment shouldn't be a problem.
If a guy wants to have children than HIV positive would definitely be an issue.
I think the guy who that to you is a jerk. In general, if I were HIV positive and I would look for mates with the same diagnosis. It seems it would make things easier in general.