It sounds as if he has crossed some boundaries and has been unethical at times. Red flag. You will need to decide if you are wasting your time and if the relationship is bringing you pain when it ought to be healing. If his hot and cold behavior becomes a pattern, that is surely a path of pain.

Could you talk to him about this? I am not sure that this approach is even a good idea - good therapy doesn't, shouldn't, make one's mind spin about the intentions of the "therapist". Sometimes red flags are there for you to protect yourself. But if you continue to see him, this might be a necessary discussion. I have been there and understand the confusion and feeling distraught. I am so sorry.

You decide what you want to do with your life. You choose or not choose college - but know you are following your own inner voice. It would be helpful to have a good therapist to help with this. But I will say it is ok to try out things to help you learn more about yourself, to build upon positive things in your life/inside of you - whatever they may be.
Best wishes.