Hi Renouned, I'm sorry that you've had to go/are going through so much, but I would say that the reason is about them, not about you.
It doesn't matter how quiet, underspoken, less extroverted etc someone is..........that doesn't give anyone the right or "justification" to bully them. There is no "justification" for bullying!!!
Now maybe there are some issues re: the bullying in the past you need to work through with your T, but for the here and now.........the people who are treating you this way now...........is there any chance you could distance yourself from them/cut some of them from your life?? And if it's going on in college, is there someone you could talk to who could address it.........tutor/college counselor???? It is the college's responsibility to address bullying!!
But if you want to talk about the circumstances a bit more...............
And just remember there are certainly people on here who value you.

Alison