My Boyfriend

Me And my Boyfriend yesterday made 10 months together Im so happy but the thing is he's cheated on me before . I've had so many trust issues before with a lot of guys because so many have cheated on me .. so when I met my boyfriend I trusted him so much because he was so amazing to me and 2 months ago I found out that early in our relationship he cheated on me ... I don't kno if I should trust him or not . He gets mad at me now all the time for wondering where he is when he doesn't pick up my calls .. I don't kno what to do anymore. HELP !!!