Advice please.

Angelina
My boyfriend has been so distant and he says it's cause he is sick but when he is around me I can tell it's more than that. First of all he refuses to go to the doctor. He also does half days at work and then goes around the city with his friends till about 6pm. He comes home every night but I'm always wondering if he could be with someone else other than his work buddies. He promises there's no body else but I feel so alone in my relationship.  At night he barely even wants me to touch him cause he says his stomach hurts that bad. If he is being serious and it really is his stomach why would he go out all the time. He's confusing and i feel played. He lives with me though. Should I try to move on? What do I do?