More changes in the friendship garden

So lately I've decided that I'm tired of being the "maybe" friend. I'm tired of making someone a priority in my life and not having that returned. This girl and I, we'll call her Gingy. She's been what I had considered a best friend for a good 5 years now. The last couple of years we've gone in different social groups. I thought this would be okay. Well I guess I was wrong, because now she only calls on day that she is doing absolutely nothing, and when I ask to hang out she says her mother won't let her and I find out later that she's gone to hang out with other people. I would have no problem with this if she wouldn't call me the next week and wonder why I haven't answered her phone calls. Uhm HELLO. Ugh. I just dont' know if its time to let go of this friendship, or try to hold on to it. I'm leaining towards letting it go. I dont' need this in my life