I'm going on a study abroad against my so's wishes
Does she think you will cheat while abroad?
No, but I know she will be sad if I don't visit her more often
Relationships are important but you shouldn't give up on your dreams for a relationship. It could lead to resentment and the relationship won't survive.
Yes, I have to pursue my dreams, I can't listen to my partner in this matter.
I wish you good luck with your venture. I hope your SO will understand it.