Missing my ex

2 months ago my ex of 9 months dumped me because he thought there were cultural differences between him and my family and he saw no future in the relationship. I was and still am absolutely broken as I was trying so hard for this relationship to work ( I live in his country as a graduate student and was learning the language etc. in order to stay and work here). It hurts me how he could give up so easily when I would have given up everything for him.

Sounds pathetic I know but he was my first relationship that was so serious.I cant get him out of my mind and miss him terribly eventhough he hurt me. What can I do to get over this? Sometimes I really want to just text him but stop myself. I cant focus on my studies and feel empty.