Am I overreacting to being blown off?

I really got sick of people blowing me off and I cut them out of my life. One of my ex friends would tell me hey lets meet for lunch. I would neither hear from them or see them that day and they never apologized for skipping out on me. That same friend scheduled to hang out when they knew I had work, they neglected to reschedule. They would hang out with other friends without me and only hang out with me once in awhile. I felt like I was almost friendless over the summer. I say let them go, it made me feel worse to keep them as friends then to just say screw it and move on. I am a good person and people tend to take advantage of that, as a good person you need to stop letting people take advantage of you. You are not overreacting cause it sucks to be left out and it makes you feel like crap. Friends are not supposed to make you feel that way, if they don't care how you feel move on.