He thinks I cheated but I'm okay with him texting girls?

My boyfriend of 1.5 years has a lot of female friends that he texts and it doesn't bother me that much cause he's had me hangout with them and stuff and they have been close since middle school or high school. Well I have a new male friend from work and I was texting him about how much i love my boyfriend and asking for guy advice on a situation with my boyfriend and my boyfriend saw I was texting him and brokeup with me. My boyfriend never saw the messages and is *assuming* we were flirting/I cheated on him. He won't talk to me at all now. Should I print out the messages and mail it to his house or show him somehow? The messages have 0 flirting whatsoever. I don't know what to do I'm so hurt we haven't talked in 2 weeks
He thinks I cheated but I'm okay with him texting girls?
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