Does she want to get back together?

So two months ago my ex and I broke up. We'd only been dating about a month, but prior to that we'd talked a lot and been very open with each other and to both of us it felt like a lot longer than it was. Anyway, two months without a word to each other and then out of the blue she sent me a text asking how I was doing on Tuesday. We went back and forth talking about school and later a little bit about sports. I'd texted her about what classes she had on Wednesday (on Wednesday) and she told me and I'd said something else after that, but beyond that she hasn't texted me since. I'm having a hard time figuring out what her intentions are or if she was just keeping tabs or something. It makes me feel kind of sad even though I shouldn't. I'd missed her for a long time, but not to the point of being desperate or anything. What should I do?

Soo I don't think she wants u back,maybe she wants just keeps in touch with u..
Everything depends on how she was acting herself on ur "date", was she nervous,tried to touch u or smth like that?

What are you talking about? She just texted me out of the blue. I didn't go on a date with her.

You would really need to talk to her more before you could figure out if she wants you back... I think she's just trying to keep in touch with you. I know personally I have contacted ex's out of the blue simply because I miss talking to them and I hate the a relationship can ruin a friendship as well. I wouldn't read too much into it. If she wants you back she will start suggesting to hangout and catch up etc. If she's just texting you it's just her way of saying, "Hey, I haven't forgotten about you and I hope you haven't forgotten about me either." She's just keeping in touch it seems. If you are still interested ask her to hang out and catch up and see what she says, always better to take the risk than to miss out right?

I've been thinking about it a lot. On Tuesday (about the same time she texted me last week) she sent me a friend request on facebook. I let it sit for a majority of the day before I accepted it. Her birthday was Wednesday and I texted her saying happy birthday, but unfortunately got no response. At first I was a little hurt, but then it occurred to me that texts can be easy to miss..especially on your bday if you get so many of them. We had a little bit of interaction on facebook that seemed real light and friendly so that's definitely a plus. At face value all of these things seem so simple, but given the way things ended between us it makes me think a little differently. Here's what I mean: I had a death in my family over the summer and I guess I became a little bit on the unavailable side emotionally. She subtly said she was going to give me some space, but I was so distraught I didn't understand and made so many mistakes.
Long story short, she came and spent two nights with me after I came back and they went really well until we both decided we wanted to get to a higher level of intimacy..we should have waited. She went back and forth between wanting to talk and not wanting to talk and to make a longer story short, I vented my frustration about the whole thing to my sister, she messages her on fb, I get the riot act the next day, and she tells me that if my sister doesn't apologize then it would be the last time we talked and she'd block us both on fb. Well my sister did nothing and it was over. That's why I don't see these simple things as being so simple.
I really want to talk to her..it's just that I don't know if she wants to talk to me. Plus I don't really know how I'd get what I want to ask her into a conversation. Before everything just happened and I felt like I knew what to do. Now I feel lost. Any suggestions?

So I would say I made some progress today. I took a risk and gave her a call. It rang til it hit her voicemail and I left it and just as I'd given up on hearing back from her she sent me a text. After I responded my phone rang and it was her. We talked for a while and it was a really friendly conversation. Mostly about school and life in general for both of us. I was careful not to bring up any past events. I got a really good feeling after I hung up, but I don't want to get ahead of myself. What should I do next?

Maybe just keep in contact for a while, and keep things light and friendly. It sounds like you two still enjoy each other's communication, at least, so that's good. You should leave your sister out of it for a bit too, sounds like she's a loyal sibling but she might still be angry with this girl.