AIO bf flirted with someone online

So I am 29 and my bf is a few years younger than me

He apparently flirted with someone online..

And he said he was gonna tell me but I'm not sure that he was going to.

And it sucks cause I moved across the US to be with him moved from Tennessee to Maine

The reason I don't think he was gonna tell me is cause I ended up basically finding out thru a close friend of mine cause their was as already a grapevine about this because he was flirting with someone claiming to be 18... But they were only 16.

We both started not feeling well the day after this happened to come out and I just feel like ...

Why did I finally try dating someone closer to my age?

Ugh.

By the way some details on this post are changed so that he won't know it's me posting about him.

AIO by thinking I've been cheated on and that I should never have moved?