Age limit

So I need some advice im dating a 45 year old and I am 19 almost 20 me and him don't care about the age he's not a pervert or just wants me for sex he doesn't look old and dirty we've been dating for 7 months now and we are like a normal couple would be. we argue we fight he's romantic and he treats me better then any guy my age ever has but my family and some other people have a problem with that and say its wrong some people say your happy and he's not hurting me so what should it matter I know he's old enough to be my dad but I don't think of him that way at all I really do love him