<human>: Can you provide a brief overview of the text?

How do I gracefully agree to hang out with them that night (which I honestly do want to do) but separate myself from them so that I don't end up missing everything I had wanted to do?

So, the way it usually happens is I'll hear of something I want to do.  I won't necessarily have someone else to go do it with.  I'll mention it to them and they'll usually agree to go.  Then, they take foreverrrrr to get ready, eat dinner, shower, what have you.  By the time they are ready to go out, usually it's not worth it.

I think they honestly DO want to go, they just suck at managing their time.  And I honestly DO want to hang out with them and see them around town, and I hate feeling guilty for leaving before them when I don't necessarily have an appointment to keep with someone.  When I try to leave on my own they feel like I'm trying to rush them and they get all upset.
<bot>: Is there a nice way to tell someone to hurry the eff up if they're part of your crew?  How can I separate myself from them when they're taking too long without being a dick about it?