Is this considered cheating?

So my boyfriend of two and almost a half years is away at a trade school four hours away from me. And I have a very strong gut feeling that is 99% of the time correct so I go look at his snapchat messages and see he’s been texting a low key whore on there. Paying her for god knows what options she has listed out in the messages such as private shower sessions and what not . I’m at an end of my rope and am shaking of anger and confusion. I get he is a 19 year old boy but does that make it acceptable. I don’t have time to send him sexy things to look at and god the shavinggggg every other day!!!! Ladies tell me if I’m overreacting please?💔 He hasn’t seen my messages because he’s unable to text right now but he’s waking up to some heart felt messages