I believe you can. It is just the normal problems of the parents and the child.
Only you know if you can or can't love him again. But is now the time to decide, I think not, give it time, you'll know when the time comes.
it depends with 'who was on the wrong side' , if you were the one ,later you will have to regret what u did and wish he/she was back, otherwise its hard to love again unless your are desparate for him/her
KavookiSoldier is right...
no that's called a light switch, on again off again. Either you do or don't.