Am I in the right or No ??

I made a post about ending a friendship either by call or letter and some one said my rules for a friend were interesting. So I want to know am I right to try to cut this off or not.

My friend was in college, I drove 2 hour there and 2 hours back to see her many weekends.

My friend graduated from college, I was there the night before and then all day until about 11 at night when I went home.

My friend's sister had a bridal shower, I drove 3 hours there and 3 hours back to support and see my friend.

I had a wedding, and friend was nowhere to be found, no call or text.

I confronted friend she said she didn't THINK she get the day off, not I didn't get the day off I DIDN'T THINK I get the day off like she never even asked. Friend said I shouldn't be hurt, She didn't mean to hurt my feelings, I shouldn't take it so hard.

Friend wants me to support her in what she does but couldn't be there for me, Am I right to cut this 5 year friendship off ? Would you ?