Relationship trust issue?

Me and this guy been seeing each other for the past five months its a long distance relationship..just recently on weekened his phone will be turn off in the middle of the night hours between eight through midnight the next morning he tells me his phone died but it seems like this been happening more quite offend..he is a DJ so he sumtimes does have to attend clubs and parties..one night when his phone was turn off the next morning he try to reach me three tmes i didnt hear my phone because i was doing laundary he accuse me of being with another guy just because i didnt pick up when he called.does it mean if they up to no good they think the other person is doing it..i love this man but im started not to trust him because my past i was dealing with this same issue and it turn out to be another women what should i do?? please help