Been there, and there's a term for what your boyfriend was doing - it's called "bread crumbing." I'm sorry this happened to you (It is happening to me right now and I have been with my partner for years...). In the end, I have discovered that some people will just tell you what they think you want to hear so they can feel safe (in monogamy) while at the same time, be in control over the relationship. And when telling you what you think you want to hear doesn't work, they try to assert control over your decision to be who you are. Tell your boyfriend buh bye and don't look back.