My boy bsf let's call him jerk I met him from my friend who was dating him but broke up a while back. Me and him started making fun each and things. Then we got classes together. We started getting closer, and then became bsf but he got a gf (who I'm friends with) I didn't really care at first but the more we got closer I started liking him. I didn't know he did too. But him and his were talking about me one day so I asked him if he liked me and he said he did but js a little bit. He started liking me after him and his other girlfriend broke up. But got with the other girl I mentioned instead of me. Recently I gave him a letter mentioning how much I liked him and stuff (him and his are still tg) but he promised not to tell anyone because we keep secrets for each other and I guess his girlfriend doesn't know he likes me. But I found out he told me girl best friend and two other people. Also I've caught him lying to me multiple times. But I keep forgiving him. This time I told to not ever talk to me again. But since the forgiving person I am I asked him if he was telling the truth and never told anyone. But his never replied after that and we haven't talked since 10 hours ago. But the thing is he said he loved the note. And I know I'm wrong for talking to him and things while he has girlfriend and we're keeping it from her. But you can call me whatever names. But do you think I should apologize for taking other peoples side, and not believing him?