Is he still cheating?

My husband had an affair about 6 months ago. I found out by looking at his text messages. there was a text to this girl about them sleeping together. So I confronted him and we split for a few days. I realized I wanted to work threw it. He promised to stop talking to her and that is was over. But over the last 6 months I have found out they have talked a few times, He put a lock on his phone for a while, until I threw a fit about it. Now he just deletes everything as they come in. He gets off work at 4 everyday and sometimes he doesn't get home till real late. And I am not aloud to ask him where he has been. On weekends he never lets me go out with him anymore. When we do go out together we come right home after the bar but when he goes out by himself he doesn't come home till anywhere for 4 to 8 in the morning because he went to an after party. When I ask him why we don't go to after parties together he says its an African thing ( He is from Kenya) So what I am asking here is does it sound like he is still cheating, and what do I do?