Hello i'm looking for a drama where the main guy married a girl that he didn't love but as time goes by he start to love his wife. do you know any drama that's like this? If you do please recommend me some!

Mask--it's one of my fav dramas, too
Mask it's awesome. I loved it. 
You should also check out Marriage Contract. I haven't watched it but it has some good reviews!
i agree with mask and mariage contract too! maybe you should check Mariage not dating but it's more comedy/romance!  
try Goong S, Prime Minister and I, Perfect Couple-(Chinese drama),
fated to love you(2014)
Golden Bride 
It's a movie but My Little Bride also fits