I believe you need to sit her down and calmly tell her how you feel and tell her you are worried and you are unsure if your worries are warranted or not. Tell her about your worries, your concerns, your uncertainties, your wants. Ask her to listen and try to understand where you are coming from. You also have to listen and try to understand where she is coming from. You both need to try to understand each other.

There are plenty of great therapists and counselors out there, and the price fluctuates and there are some with sliding scales that work with your pay. I suggest you two find yourselves someone to talk to. She may feel more comfortable communicating with a mediator/interpreter in the room.

Best of luck to you. We all have ups and downs in our relationships and sometimes we need help to work through the downs and the hard times. Sometimes we just cant to do it alone.