My boyfriend playing with my feelings
My boyfriend says he loves me and actually we've been living together for 2 years now and have a lot of plans for the future. But the thing hehas recently done amazed me and I'm in two minds if I should leave him or not. He began communicating with a girl - an acquaintance of mine - so that she came to believe he's fond of her. But he intended just to make me feel jealous, but it all ended in a scndal and he went to her place late after work without warning me. I felt crazy in guessing what happened to him and where he is, but called her by chance and he was there! He says it is his revenge for my past flirting with others and that he want me to understand something I can't actually grasp. I saw the messages they sent to each other and we three knew what was happening. But he says it's a joke, he used the girl, and she, being utterly stupid is sure he will leave me to be with her.
Such complicated a situation, so I just don't know what to do - leave him or not or anything else. I love him very much and we used to be quite happy before he got this idea of making me feel jealous. So is there a way out?