<human>: Before everyone flips out over the age gap, my parents love him, and absolutely accept the relationship.

I'm going to try to keep this as, to-the-point as possible.

Starting September 1st I'll be living full time with my boyfriend in Toronto.  

The city I live in doesn't offer University high school courses in an adult learning environment (18+ schooling). However, Toronto does. It just so happens that my boyfriend lives in Toronto, and is more than willing to have me live with him.
The problem is, I have, and have always had, issues with anxiety. I'm terrified. A huge new city, school, home, with a new job and no cats. I've never lived with anyone before so I have no idea what to expect.

When I bring up my concerns he is very shocked as to why I'd be scared, almost to the point that he's angry with me. He turns condescending and sarcastic, making me believe that my worries aren't vaild. 

I'm just afraid that I'm investing too much of my life into something that potentially won't work out. What if I hate it and we break up? Is this a bad idea?

Can you condense the text into three sentences or less?
<bot>: City doesn't offer the high school courses I need. Moving in with boyfriend. Worried about investing too much of my life into something that might not work out.