My 6 year old boyfriend cheated on me.

Hello, I'm pretty new at this, and I wanted to make this as private as possible, but please I need some insight and harsh truths. Im female (26) and he's male (32).

We met through a mutual friend and things went smooth since then, I've always had self steem issues and he was like medicine to me, because he was very attentive, respectful and loving, I realized later that was only the honey moon phase.

Years passed and the signs where there, he was sometimes flirty, liked to specially support female friends, was kinda detached when there was pression in the relationship. He said he wanted to go to the gym cause he wanted to get a better shape, I supported him all the way, he took me to his gym, after a trip we had whwre I had a depressive episode, he changed completely, he 'broke off' with me, meaning we continued doing everything normal minus the relationship status, he banned me from going close to his gym and appear on his fb, WhatsApp. I accepted it.

That was 1-2 years ago... We where a couple again, kind, now march 26th a girl from his gym send me a video of her doing a bj to my boyfriend, telling me she only found out about me recently while going through his fb page and that she was sorry.

I'm stuck with him, and It's really hard to forgive him, I don't even know if I should, I'm really tired.

Please I need your opinions.