I believe you are young and have been taken advantage of. There is nothing to be ashamed of. I was in a similar situation when I was much younger. I am 56 years old now. You are experiencing life. As you become older and have more life experiences you will become a better judge of character. This young man was probably your first and he knew that. I think you should have a one on one conversation with him to determine where you stand with him. To me it sounds like he has you just where he wants you -- at his beck and call. That is not good. You deserve bettter.
DON'T LET THIS RELATIONSHIP PUT YOU IN A POSITION WHERE YOU ARE DEPRESSED. YOU BETTER BELIEVE HE IS NOT DEPRESSED BECAUSE HE IS GETTING WHAT HE WANTS.
If you decide to continue your relationship with him, please protect yourself from sexual diseases. I CANNOT STRESS THE IMPORANCE OF PROTECTING YOURSELF FROM SEXUALLY TRANSMITTED DISEASES AND UNWANTED PREGNANCIES.