Confused?

So for the longest time I've been bisexual, and I've never been in a fully committed relationship until just recently. The second I met this girl honest to God I lost feelings for everyone i was taking to which were mainly guys. I'm now down to the point where I don't even enjoy sex with guys 🤷🏻‍♀️. I think I might be lesbian I just don't know how to be sure. I don't want to come it as lesbian to everyone and then realize that I'm just still bisexual. It's a c confusing time ladies.