Hi, I'd like to help you with your question.
It sounds like this is definitely a one sided relationship. Even though she can be supportive, it sounds like she is mostly interested in herself.
It would be ok to mention your feelings to her again. But since you have already noted that she is ok with not talking to you and she has not done anything to encourage the relationship to continue, you are most likely looking at a losing battle with her.
Saying something to her at this point may help you, however. Sometimes, it is not so much the response we get when we express something we feel to someone who has hurt us. It becomes more about getting the feelings off your chest. For example, with your situation, you could contact her via email or phone (whichever works for you) and let her know you felt hurt about her reaction to what you said. Let her know anything else you feel then let it go. Tell her that you are moving on.
The point here is not to be mean or angry, but rather to allow yourself to express your feelings in a calm and direct way.
You can also just let it go. This is also a good option since you have already let her know about how you feel and she did not respond well. Find others you feel safe talking to and let them know how you feel about this relationship. Sometimes just letting it out will make you feel much better.
I hope this helps,