How can i get over my bitterness of women if i really never had them around for emotional support or friends?

I have a good relationship with my mother first off! When i was young in high school i was the nice guy, never lucky with the girls! All the jocks had the girls. Haven't dated in 5+ years due to the rejection and just giving up overall! I got stood up at my own prom in high school when my date decided at the last minute to not go with me and to rather go with a group of friends while i already had everything paid like limo and tickets! Now 5 years later i have my own business and doing very well for myself! Now that i'm pretty successful my parents wants me to get married? I just have to much negativity toward women i just cant all of a sudden since i'm doing good just welcome one into my life and be expected to take care of her as my parents wants. It's to the point now that i don't want to take women on dates/movies, buy them candy or flower like the fool i was 5 years ago, help them if they are in trouble, don't care if they are stuck in the middle of nowhere etc, my stomach feels sick when i'm even around women and when one is a bit to friendly and talkative i get very defensive and think she is only talking me to because of what i have. I dont know why guys who get in relationships with single mothers end up taking care of her kids thats not even his! Anyways do any other people feel the same or kinda had this problem?