I don't want to give up!

[Pyromancer]

I'm sorry that he's treating you this way.  I think that it's impossible to have a relationship without communication.  His behavior seems immature and hurtful.  It makes me wonder if you're right, that he's cheating but doesn't want to entirely let go of you.

I agree with the other guys, don't go to his work.  Do you have any way to reach him?  Email?  Text?  You could simply ask him if he still wants a relationship or not.  No drama, no accusations, just a simple question.  You need some resolution here.  You can't move on til you know where you stand.