I've seen many low to mid 80's pitchers in my area get D1 scholarships in the Big Ten, OVC, MVC, as well as some others. Colleges do notice when you have the ability to get hitters out despite being below some made up threshold of velocity. There are MANY guys that throw less hard than you in D3 schools, but they are great pitchers/competitors! Work at gaining velocity, don't get me wrong throwing harder is great and makes the process much easier, do NOT give up just because you don't think you throw hard enough. If you can pitch, there is someplace you can play.