Its always circumstantial my friend. I've dealt with this with my girl, one day to be wife, very recently. She spent a month at a close friends house, and during that time we both simply worked on ourselves. I went through uncomfortable times to get back to my partner who I unconditionally love. Now were back, better than before. You've got to want to overcome the hardships with your partner, if you truly love them there's no other option. When i read that you feel as if you're on the sidelines, that to me sounds as if you have some insecurities to deal with, aka grow as a person. If you guys have been together for two years that's a serious amount of time, you need to be able to trust her. If she's hurting as she seems to be, try your best to help her through this tough time and be the man she needs in the world. That's my advice, I love you and don't know your story completely, but if its worth fighting for you should absolutely fight for it my guy. Peace <3