How can I get over this?

I broke up with my girlfriend around February this year and I thought that I could handle it but I am so missing her right now. We still talk and stuff but I don’t think that I could bear anymore of this. I see her pics on Facebook having fun and looking beautiful and my heart aches and I feel really depressed. She doesn’t know though…and even if she did I don’t think that she would care. I don’t want to unfriend her from fb because I still want to at least stay friends with her. Please help me somebody….