New to poly -- Feeling disconnected from my partner after the person I've been talking to/seeing ended things.

I (26F) have been with my partner (27M) for 7 years. I'm bisexual and have dated mostly men, but recently my Kinsey scale score has definitely shifted towards women, and I've been feeling VERY strongly about needing to explore that part of myself and date women. My partner has been as amazing as a partner could possibly be about my feelings and sexuality. After a lot of loving communication, we decided to explore polyamory, and I started dating women.

Now, I'm not a casual sex person--i'm a little bit demi and usually need some sort of established relationship, otherwise, I'd just go have casual sex and this would probably be a lot simpler lol. I started talking to a girl last month (30F) and really liked her, but ultimately she decided a poly relationship wasn't for her. I feel like my feelings for her have overshadowed my feelings for my partner--especially since she ended things. A month ago i felt like my partner and i were the best we've ever been, and I'm just not sure what feelings to trust. In reality, I don't actually know her that well so i'm probably feeling quite a bit of limerance. She and I just seemed to have a lot in common and I was (and still am) very into her. In an ideal world, she'd be poly, and I know there are plenty of fish in the sea, but my feelings (or limerance) are causing me to question myself in all sorts of ways. Maybe I just struggle with rejection and I'm thinking into this way too much?

I know sexuality is extremely fluid, but how strongly I feel about women lately is causing a bit of an identity crisis given that I'm in a long-term partnership with a man. Is it normal to love someone but not always feel "in love" with them? (in hindsight is that partly the point of polyamory and ENM? lol) Am i just enamored by the dopamine of "new crush" and "sad that the new crush didn't work out" feelings? I guess I just don't know what feelings to trust and wonder if anyone has had a similar experience with starting to date and feelings towards their long-term partners in general.

EDIT: THANK YOU GUYS for all of your comments and sharing your experiences. I feel sooo much better and much more sane lol. I made it a point to spend quality time with my partner last night and I’m feeling much more connected bc of it. I’m super new to poly relationships so thank you all for being so incredibly helpful and validating!!