Sure, that would throw anyone off. It's unfortunate that it happened 2 or 3 times. Understandably, it would make you feel your space was being jeopardised . He did have good reason, of course, but the damage is till done, IMO.
I think planning ahead for an Autumn start to college might fit in nicely with your therapy. By Autumn you will have worked through a number of your own personal issues and be in a better frame of mind to start a Psychology course. I imagine as you progress through your college, you will definitely research things that are of significant importance in your own MH. The last thing you want is to become too emotionally involved throughout your studies, if that makes sense; it's best you are more "together" within yourself. I remember years ago, when I did various counselling courses, the course content were always throwing up personal issues, not just for me, but other's as well. In the particular bereavement sections of the course, you were not allowed to take part if you had experienced significant loss in the last 12 months.
Talking of getting your teeth into something soon. Does voluntary work interest you? Gaining experience with anything like, Youth Projects, homelessness, and even the elderly, are all about providing a service to people, and that will look brilliant on your CV
Hope you're having a good day... maybe a little sunshine to lighten the mood! We had a sunny day in London, it makes a huge difference to my mood