Should I drop out of my sorority?

It’s almost the time where you need to pay/commit officially, and I’m still trying to decide if I want to do it.
Here’s some background info:
I go to a big state school, in my state, so I already have friends that I hang out with outside my sorority. If I dropped, I’d have one close girl friend not in a sorority and some other girl friends not in one, but the rest of my close friends are in one. I have guy friends too not in one.
I went into rush just to try it. Every single day of rush I’d say afterwards “I’m not going to join one” and for some reason I kept sticking with rush, but the whole time I didn’t think it was for me. Then, I ended up getting two top tier houses in my top 3, and that made me kind of excited. I put those two at my top two and almost didn’t even put the third one on my list. But my leader told me to. Well, I ended up getting the third one. It hurt really bad, because most people get their #1, or at least their #2. I almost didn’t show up to bid day but the leader (called Rho Omega at my school) told me it would be stupid to not give them a chance.
Fast forward, it’s been 3 weeks since bid day. I still don’t feel the vibe of an instant connection with them. There are two girls I really like, but the others I’m not super crazy about. I’ve been to a few mixers and events, and I just haven’t fallen in love with this sorority, or even the idea of being in a sorority yet. However, I like the idea of having this way to make girl friends, and always having events to go to. I just don’t know if this is right for me. It’s really stressing me out and I don’t know what to do. I think I will call or text my Rho and ask her for advice but I also wanted to write about it here.
Also, the other thing is, because I already have friends outside of my sorority, I spend all my non-sorority time with them, like lunch, extra down time, etc. I know I could become closer with the sorority girls if I spent more time with them, but I love my other friends and don’t want to lose them.
Any advice? Thanks.