Is it normal i don't ask anyone for anything?

I have some people I consider friends, but I don't ask them for help. Ever. I won't ask to borrow money or for a ride if I can't pay. No matter how much I need help with something, I won't ask for it. I just don't trust people to follow through, or I expect to be blown off. In fairness to me, I used to ask but got so tired of being blown off or having the person not follow through that I now don't want to depend on anyone. I also have no problem cutting off someone who burned me. When I was deathly ill two weeks ago, a friend offered me a ride to the pharmacy to pick up the prescriptions the ER gave me. After waiting five hours, I ended up walking and making myself sicker because the pharmacy was about to close. She texted me hours later apologizing because her hair appointment ran over. Umm, no. I'm done. You can believe I won't count on you again. My lack of faith in humans' ability to care for others is totally gone.