What to do?

[crosscaravan]

Mm, here's something else to consider -

Even if you don't mesh 100% with the active sisters now, that's not to say you won't get along well with the other members of your pledge class, or of pledge classes that come after you! The addition of a new group of girls, even a small group, can change the chapter's dynamic, and you may find that there are or will be other girls in your situation. Get to know them! Even if they do party, you may find things to love about them. You were all brought in on this together, so the chapter's seen things in your entire pledge class as a whole that they loved and wanted in their lives. You all have a lot of potential to offer each other, don't squander it!

Or, alternatively, give going out every so often a chance. I'm not saying that you should go get raging drunk, but tagging along can be a ton of fun even if you don't drink. I don't drink and I'm super-shy, and I love going out with my sisters from time to time. Yes, the older ones drink, but there are actually quite a few of us who go out and don't drink, and getting out of the house is a really great way to come out of your shell and meet a ton of fun, interesting people that you might not get the chance to see otherwise. I'm not saying you have to go out every night, either - but occasionally, it can be a great way to relax, unwind, and try new things. Your sisters will understand if you just want a quiet night in sometimes, too.

Honestly, because of your class standing, I'm inclined to agree with thetalady regarding your chances of re-rushing and getting a bid. Juniors do get bids occasionally, and I can't claim to know the ins and outs of your campus, but that occasionally is generally when they're rushing for the first time. I can honestly say that I've never seen someone get a bid, depledge, re-rush as a junior and get a bid to a house they liked "better." It tends to just end in tears for everyone involved.

If, by the time it's initiation for you, you really don't want to go through with it, and you think you can be happy without the sisterhood - don't initiate. Don't make yourself miserable. But honestly give it a chance and don't dwell on the other two houses, which is what it sounds like you're doing a lot. It's not fair to yourself or to the women who wanted you to be their sister. If you keep thinking about what could have been or keep staying hung-up on the differences between you and your sisters rather than your similarities, you're never going to notice the amazing things that are right in front of you. What you put into sorority life is what you get out of it, so please do give it your all before deciding that this sisterhood is not for you and that you don't want to be a part of it!

And by give it your all I really do mean that - sorry to be blunt, but don't half-ass it. I've seen girls who show up occasionally to meetings but never do anything else, and spend all their time with other people, and then depledge because they didn't feel they were a "good fit" with the chapter. I can't say that this is your situation, but they had similar mindsets as you, so be sure you're actually giving your sisters a chance before doing this. It will be downright difficult if not flat-out impossible to get involved in a sisterhood again if you end up regretting your decision. It's not something you should decide to do lightly.

ETA: ...and once again, what I meant to be a short reply turned out to be rather tl;dr...