I just dumped someone too and have dumped guys before. I do miss my ex but I still love being single but I know for a fact that out of all my ex boyfriends, I miss the one that was best to me the most and at a point would have done anything to get him back (not the one I just dumped). Also, the fact that he wasn't available anymore or just don't interested in having a relationship made me attracted to him even more. Someday, if you were really good to her, she will want you back and you will have moved on just making her nothing but an old memory. Move on and have fun, you deserve better. :)
Ps. She won't start missing you till a month at least. DONT contact her and show her you can live without her too. Having dumped someone 4 days ago and said we could be "just friends" I can't stand that he keeps calling me and reminding me he still loves me, I dumped him for a reason.