Should I keep playing basketball?

I've been playing basketball for 4 years and I've been doing year round basketball for a year. (Since last spring). I really like the game and I liked my regular season team. I'm going into highschool this fall and I want to play basketball then. I don't really want to play spring/summer ball because I'm treated like the worst on the team even though im not "bad". I always am the one to sit out when we practice with more players than we need. Games haven't started yet but I probably won't play then either. Also, they play me down low and I was always a guard last season. I'm shorter than the rest of the posts and I'm not going to do well against them. This whole situation makes me feel sick. My parents also paid a lot of money for this league which makes me feel worse. I don't want to be ungrateful but I don't want to be turned away from basketball forever. It just comes down to how I don't like the coaches decisions and Im sure I'm not bad at basketball. I'm equally good at ball handling with both hands and I can shoot pretty consistent threes and I'm consistent with every other shot. I'm not the fastest on the team but im not the slowest. And I try and im not disrespectful at practice. I don't know.