How to stop feeling guilty?

I'm bisexual but very new to dating women. I've been doing online dating and really like it! The problem that I'm having is that I feel guilty not wanting a second date when it seems like they do and are waiting for me to ask (I initiated all the first dates). I know that's kind of what dating is all about, and I wouldn't mind if someone I went on a date with wasn't into me anymore, but I still feel really guilty for dating super cool girls but not feeling like they're the right fit? It's weird because I have no issues rejecting men, but the thought of hurting another woman's confidence in any way crushes me because I know what it feels like. I really want to keep dating but I've been avoiding it because I still think about the few girls I've been out with and feel guilty all the time for not staying in touch (even though I'm sure they've forgotten me by now lol). How can I stop worrying so much?