Silence kills?

Broke up with my ex months ago but we remained friends, even when she got a new boyfriend we still talked and hung out. Now we rarely talk and the last time she made plans with me she ended up backing out with no explanation. Today I text her asking how she was and I got a response. I sent another message asking if everything was OK between us and just as I thought, she ignored it. She always ignores the serious questions I have. Why is that? I told her that if she wants me to leave her alone I will but she will never say it. In a weird way I want her to tell me to f*** off so I can be over her but she won't do it. It would help if she would give me an indication as to how she feels...whether it's good or bad I want to know. What do you think she is thinking?
Silence kills?
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