Need advice on my girlfriend and our relationship:/?

Hey guys, and girls basically I met this girl last year and we got together in july last year, its a long distance relationship. It was going good until she says shes struggling in the relationship. This was only a month or 2 into the relationship.  But anyway she broke up with me and said she isnt ready to be in a full on relationship so i said id wait for her to be ready. Then we got back together and before christmas the same thing happened. She broke up with me and i said id wait for her to be ready. That sounds so stupid on paper but i love her so much and it makes sense in my head because i promised id stay with her no matter what.

Anyways, here is my issue. We had an argument.I said it was unfair that she kept breaking up with me and stringing me along. She knows ill do anything to be with her but i said she needs to make up her mind. And also, and this is my main problem, she wants to volunteer in another country, and im completely against the idea. When i asked her what she would choose if she had to choose between me and volunteering, she picked volunteering!? Like really? You suposedly love me. So we argued about it earlier and she says what i said was unfair about everything. What do you guys think? Im literally so lost at the minute. I love her to bits :( thank you so much for any help in advance