My feelings are hurt. Am I being unreasonable?

My girlfriend is spending a lot less time with me. I don't harp on it too much because she goes to school and works. But She's been really lately at even initiating texts. To summarize concisely, I've noticed the following:

1) when she does text a lot of is what I call empty compliments. Instead of meaningful dialogue it's just 'you're so awesome'. It's kind of annoying.

2). She'll say things like 'maybe tomorrow'. But when tomorrow comes she's busy.

3). She's spent the last week being busy writing her speech... That's more speech writing than I could possibly imagine.

4). She hasn't initiated any plans in two weeks, and the only times she has is if I say I miss her.

Tonight, however, I felt hurt. I opened up to her about how I feel like I'm the only ken lately putting in an effort. So tonight she went to a house party, and then texted me drunk saying it was a great time and that she was dancing with guys and it was great.

I feel hurt by this. Like she doesn't care and is keeping me around. She says she wants to keep me around and she warns this to go somewhere, but these actions are convincing me. Otherwise. Should I just dump her? Am I justified in being hurt?