I have a question...do they hate him or dislike him for any reasons, other than the cheating? Is he bad with money? Is he a drinker? Did he abuse you financially and borrow money which he never paid back, or would pay it back and then borrow it right back from you again, in a cycle? Does he not want to work or pursue a better job? I am wondering if they hate him for any other reasons...but, the cheating in itself is bad enough.
Why do you feel you can't be happy or content without him? He had no right to cheat on you and hurt you. What's so great about him, that you can't just let him go and find somebody better, who is honest, loyal, and who cherishes your feelings? What's so desirable about somebody who cheats? I would think he'd be very repulsive in your eyes and you'd want nothing more to do with him. Are you dependent on him for money? It sounds to me your family cares a lot about you and you have a home to go to, meaning, they'd be kind enough to take you in, no matter what. That is a very valuable thing to have. Always put your loving family like your mom and dad FIRST, before any guy.
Betrayal and sneaking around is never something good.
But, it's up to you. If you want to forgive him for the cheating, that is your right and your decision...however there are people here who will tell you that liars don't deserve a second chance, at least not when it comes to a lie that involves cheating because that goes too far, and some will insist that cheaters never change.
However there are some that think even cheaters deserve more chances...and...if the cheater is a really good provider, to just turn a blind eye and just enjoy the soft, comfortable, easy life they provide for you. Or, they will say in some circumstances, the cheating was justified.
Have you taken AIDS, HPV, herpes and HEP tests? Cheaters also easily spread disease.
Well, good luck to you...I hope you feel better and make the right decision, whatever it turns out to be. Your love for him must run very deeply if you still want him. I do think though you should listen to everything your concerned family and friends have to say, and listen with a very open mind. Please don't stress your parents out too much about this...and please remember...with age comes experience and wisdom, so pay very close attention to what older people have to say about things like this...like what your folks have to say about it. They want what's best for you and want you to be safe and happy. No girl ever dreams about falling in love with some lowlife cheater someday...I doubt he is really the man of your dreams, if you really thought about it.