DPHS -
One thing that is not being touched on is this, how good of right fielder are you? This of course may need evaluation by someone who can be honest and has the knowledge to do this. Also if you are throwing low 70's, then is this the velocity from right field? How much do you "throw with your legs"? And if you play right field, can you hit mid 80's to low 90's pitching? And what kind of hitting? Spray bloopers, hard hit through the middle, line drives into the outfield? Many people think (I was there once too) that being a good defensive player is what is important and then wonder why their kid is not playing and the kid just can't hit, or can't hit good enough when hitting is half the game. I assume you are playing varsity and if your hitting is good, I would think that you would be hitting .300 or better depending on your situation. And your hitting would be hard hits, not weak infield singles. I don't know for sure, but I would think that college coaches go for the hard hitters since their defense moves faster as a whole than HS teams. Also what kind of speed do you have? Should be at least low 7's for the 60 yd.
Back to the pitching. Can you consistently throw all these pitches for strikes? Can you hit spots, especially with the fastball and change-up. If your fastball is low 70's, is your change-up around 60? Do all your pitches move? Can you consistently hit corners with your moving pitches?
The only problem with just pitching is you are putting all your eggs in one basket and losing a whole year of hitting practice. You might not get the hitting back good enough if you need to fall back on it.
Also depending on those around you, you need to compare yourself with others in college not on your HS team. If your teams are weak in your area, you may be the ace on your HS team and summer team only to find you are at the bottom rung in college.
Like other said here, keep keeping on and don't give up. Do the best you can and then you can be pleased that you did your best no matter what the final outcome is.
Also TR is right, how are your grades?
Tim Robertson