No one to talk to

So lately I've been having lot of problems with my boyfriend. Not directly with him but I have thoughts about a lot of things I don't really tell him these things because I don't know if I'm overreacting. I don't tell my parents either because I don't want them to worry. I don't have close friends that I could trust with personal stuff like this. And I just feel lost because it's building up and I start to feel crazy.