What do I do? He’s cheating...

Sooo my boyfriend and I have been together for 6 months. I’m not in love but I really do love him ...

Not too long ago (maybe 2 months ago) a girl texted me saying he was contacting her non stop & he was flirting with her. I didn’t believe her because I didn’t have proof & he told me she was lying.

Last night a boy contacted me saying that my boyfriend was texting his girl and flirting. I have pictures of the messages and the date/time stamps.

It was literally the day after our 3 month anniversary & im just now finding out. Should I forgive him and try to trust him again? All of these people are across the country in his home town but there’s no garuntee he probably isn’t contacting or seeing someone in our local area or seeing them when he goes home to visit...