shortkake

I just recently a few months ago found out that I had PCO. Since then I've kinda ignored it and not thought about it so much. My doctor put me on Yasmin birth control pills so I could regulate my periods and also help the hair growth. My boyfriend and I have been together for 8 months now. He cares a lot about me and we even plan on marrying each other and having children hopefully someday. He knows that I'm taking birth control pills but isn't fully aware why. He thinks I'm just taking them because we're sexually active. When I found out that I have PCO I told him that my doctor put me on birth control and I can't get pregnant but if I want to I have to take other pills..I feel like I'm hiding this from him. And can't go through dealing with this alone anymore. I haven't told him yet. And seems like I take my anger out on him that I have this lately. It's an easier solution than telling him why I have all this anger but it's not right. That's why this weekend I plan on telling him. I just don't know how he'll react and I'm a little scared he'll leave me. But I'm positive that he loves me and will accept it. But at the same time how do I bring it up and explain it to him?