No need to feel ashamed at all. This is a mental health site and we all have things we are struggling with. Sometimes we are feeling needy or lonely or angry and we need to post about it. It's good to get it out into the light because then you can begin to deal with it in a more healthy way.
Remember that our feelings are not always indicitive of the truth or of reality. Feelings can change from moment to moment. And that's okay.
I hope you are feeling better very soon. Many understand how you are feeling and are here to support you through it all.