i do pray for him and everything but i dnt know how to not resent him how to not love him
If a person behaves unjustly against a party, then it is only
natural that this party would harbour feelings of resentment. That's how Allah has created us. For example, a father who sells his daughter to the first guy he can find for beer money is obviously not worthy of any respect and any resentment the daughter may feel is well deserving.
The bigger picture is, we want all people in this world, especially those close to us and those we have a bond of kinship with, to go to heaven and be protected from the fire of hell. Hell is something we have to avoid at all costs. The punishment is very severe. So in that regard, we have to hope and pray wholeheartedly for their guidance.
If a parent has behaved in an awkward, unjust/sinful manner your whole life but then has a sudden change of heart and feels ashamed and seeks forgiveness from you and Allah and sincerely sets about to change himself, then you should rejoice and the love would automatically arise. Otherwise, if one persists in the same detrimental mode of conduct, it is only natural that those affected by his behaviour will feel resentment.
Keep hope inshaAllah and make plenty of dua. You know in your heart that if he were to 'change' that you would fall to his feet, right? So there's your love. Try to dislike and hate the
action that a person does but
not the person himself.