I think he is seeing other people too.

Me and this guy have been seeing each other for nearly 7 months now. The relationship started off on the wrong foot, as I was already engaged when I met him. I am still living with my ex (not as partners) but I am moving out soon. But the guy I am seeing, well I think he is seeing someone else, although he says he is not. When I go round there I have seen lipgloss on wine glasses. I confronted him once about this but he said it was his fathers girlfriends.. but I dont believe him.