I'm probably a lesbian but don't want to break up with my boyfriend.

He's a wonderful person and is incredibly patient with how easily upset I can get. I don't spend much time with other people and I'm worried that if I talk to him about this we'll break up and won't see each other again. And while I love him I'm not sure it's the right type of love. I tend to struggle with identifying specific emotions and I'm not sure I've ever truly been in love with someone. I feel like a bad person for not telling him about this at all but I keep hoping I'll stop having these thoughts. I want to love him the way I think I'm supposed to.