Is it wrong of me to be somewhat bitter? Scratch that, EXTREMELY bitter?

My ex and I dated for 6 years from 18 to 24. It was one of those long relationships that everyone knew was doomed to fail. We blamed most of our problems on the situation we were in.I always hoped things would get better but they never did. In hindsight our relationship was just unpleasant, she treated me poorly to say the least. Anyway, I ended up paying for a year and a half of her college and delayed graduating myself. (Love makes you do stupid things) Now after graduating I am single, unemployed, and up to my *** in student debt. She on the other hand is dating some guy that evidently she isn't an (insert expletive here) to. She got a job right out of school and now seems stable and pleasant. This sickens me. I'm annoyed at the scenario that this guy now gets to reap the rewards of all my hard work. I don't want her back and I'm not mad that she's doing well. I'm glad she made something of herself. What bothers me so much is that this new guy gets all the stuff we worked years to accomplish. I got nothing but fights and emotional damage, while he gets a 52 inch tv and free trips to Costa Rica.