<human>: So I had asked a girl [22] who I'm interested in to hangout this weekend, but she is busy (gave a valid reason, but I initially thought she wasn't interested back).

Me, being single for 3 months and just wanting to spend some time with a girl tonight, texted this girl [21] I met about a year ago. We hooked up (everything except for sex), and she gave me her number and told me to phone her. I never did because I could tell she was really into me, but I don't see her as the type of girl I'd like to date.

Now today I'm asking myself why in the fuck did I make plans with [21]?! I hate it when girls give a number and don't answer, or lead me on... now I'm doing the exact same thing. I don't want to be a hypocrite and do such an asshole thing. Furthermore, the girl that I DO like [22] didn't reject me, she was just busy... these girls don't know each other, but all of us have some mutual friends. Hanging out/hooking up with [21] might mess things up with [22] if we ever did start dating. 

I seriously think that I should cancel tonight with [21] and if she does want to reschedule, then I'll suggest coffee or something instead of watching a movie. 

Does anyone think that cancelling/rescheduling would be the right move? Both in regards to respect, and keeping the door open for a chance with the girl I like?

Can you provide a brief overview of the text?
<bot>: girl I like is busy, so I made plans with a girl that likes me but who I'm not interested in. Realize I shouldn't lead one on and blow chance with the other. HELP