Throwaway. He knows my main. 

I'm looking to go to a summer school abroad. It's a pretty decent one, fully related to my future career and it's in a place I've wanted to go for a while now. Also I have a friend who lives there who got really excited at the thought of meeting me, so everything seemed pretty positive.

My boyfriend has also been there (without me) and so I asked him about hotels, flights, prices, etc. 

He thought it was a holiday and that we were going together to which I said I'm primarily going for the summer school, not to be a tourist and explore the city, and that since it's a school, he wouldn't really see me that much so it makes sense to go again some other time when we can be a couple and do couple things around this place. 

But he was still really pissed off that I plan to go alone. 

I, personally, think it makes more sense for us to go another time where we can have fun and chill out together, since it's a Monday-Friday type of thing and I will be busy on my own for a good chunk of the day. If no one else comes with us, he'll be on his own in a different country and I don't personally feel comfortable putting him into that position.  I tried explaining that to him but he got even more pissed off at me. 

Now I don't really feel like going. I haven't made any forms of payment yet so I can choose not to go. But this whole situation has got me feeling deflated and a bit conflicted. 

So AITA here? Am I wrong in why I decided it would be better to go alone? 