What do I do

I’ve lost control of what’s happening in my love life. I have a Boyfriend and he is honestly the sweetest most genuine person I know. He has a big heart, and a good personality to match. We’re in university together, he helps me with stuff, we study together and he cooks for me, the sex is good as well just basically everything a girl needs from a relationship. We’ve been together for 5 months, and I just don’t feel the same about him anymore. I’ve been battling with my sexuality for so long, trying to figure out where I belong in the spectrum, and the confusion is getting the better of me. I’ve recently started talking to this girl, she’s amazing as well, but a bit too early to tell. I hate the fact that I’m being deceitful to this boy who cares so much about me, and I genuinely feel as though he deserves someone who will be on the same side ave as him and not being confusion into his life. Help me hat do I do