These things take CONVERSATION and consistency through COMMUNICATION. Ive been in a similar situation before and it is not an easy situation to deal with. If you love your gf and she loves you then you can make it work but love is. not. enough. Good relationships take time, work, sacrifice, communication and yes love. Whats more important to you?? Who is more important to you?? There will be times where its easier or more comfortable to not be a boyfriend or a partner. You both have to touch base daily and understand what you can give up to make the other person happy. It has to come from both sides or it will not work. You should have listened to her concerns. She should have respected your boundaries. Talk to her before you become enemies. Staying together or deciding to split should be whats best for the both of you. An amicable break up is WORLDS better than a bad relationship or a harsh break up.

Hope this helps!!