Go cold until she replies with really honest reply or go in separate ways.
I think - all or nothing. If she's not in - leave her. If she's in - make the relationship spin again, blow some new experiences

I can see you are struggling to hold things together. I want to inform you that there is help out there. I have been through similar situations with my current girlfriend to the point where I thought there was no way around the problems we had. I was at the maximum level of desperation to save my relationship. I learned a lot through surfing on the web about the conflicts that my girlfriend and I were facing. One example would be wrongfully dealing with constantly fighting situations about pointless things. I also learned important information such as:

- Tips and tricks to create and maintain an everlasting “spark” for you and your soul mate

- Why problems in a relationship at a certain stage arise as often as they do

- How to avoid these problems and being able to get over them with ease

- What it takes to know that both you and your partner are putting in 100% effort into a successful relationship

In reality, most of the mistakes occurring in relationships are not as serious as one or the other partner can make them out to be. Don't let you mind fool you into thinking there is no hope in salvaging your relationship; it will take sacrifice and willingness to move forward from both parts.

Source: relationshipsforum dot org