Why does she keep canceling at the last minute?

A-Vengeance
Every time my girlfriend makes plans with me she always cancels at the last minute. Every time I make plans with her she always asks are we still on for whenever? When its time for us to do what ever it is we planned she always says "Yea I don't wanna go." or "I don't feel like going" or "I can't go" never a reason and "Im to tired to go" and "i'll go next time". The bad thing is that this happens all the time. I ask her if she wants to do sumthin every month an she tells me yea but always cancels when we're leaving to go. All this month I tried to make plans with plans with her every week. last week she canceled on me twice on wednsday for plans for Friday and again on Friday when we were walking down the street to go. Every time I make plans she cancels. Out of every time I made plans with her since we've been together she's only been able to go ONCE. She says she too tired to go but she's never too tired to go to her after skool program with her "guy friend". Should I just stop making plans with her?
Updates
+1 y
Ignore the "guy friend" part. I was just venting from something that happened a few weeks ago
Why does she keep canceling at the last minute?
2 Opinion