He told her he likes her more then he should ?

Me and my boyfriend have been together for pretty much a year now. I’m his first girlfriend however he seems to have a fan base among the online girls and has one or two that have crushes on him.

This morning I went onto his hotmail account (which he said he doesn’t mind what I do as long as I dont mess around with anythin) with the means to write him a sweet lovey note & save it in there for when he comes home & checks his emails & stuff (I would have emailed it but he doesnt tend to check emails unless it seems important & I did want it to be a surprise). To cut things short I clicked on sent by mistake seeing an unknown email address my curiousity got the better of me and I clicked it to see if I knew them or not. However it was to a girl that has a crush on him.

She had been asking him if he liked her and he told her that he kinda did, more then he should & deep down he hoped she felt the same to.

I told him honestly that I read it and asked him why he did it. & he told it was only to make her happy after she had a bad week.

After a long discussion he finally admited to me that he did have a small amount of feelings for her after he repeatedly assured me he didnt.

I know it seems really stupid but Im really upset even if he says he likes her that way barely at all & I know the chance that they’ll even meet is quite low. I know I seem to be over reacting.

But how do I stop feeling so depressed about it ? Because at the momment I guess I feel a bit betrayed even though he says its the tinyest amount.