Want to be in love with my wife again

Samuel,
I am about 5.5 months out from last contact with the AP. Have to admit I think a lot about her and the fantasy and hurt she caused me.
I now seem to be ambivalent and want to get put of that but cant seem to let myself step forward out of this box I have created for myself.
I am scared to put in 100% because I dont want to hurt my wife again should it just not work. I dont feel the love I think I should! I love my wife, but cant seem to find the passion and caring and loving she deserves. Honestly and I deserve. I dont want to go back to what we had- I hated that. I want to have fun with and enjoy my wife and vice versa and if I cant then I want to let her go so she can find that happiness that I cant give her.
How do I find that passion and compassion again?