my friends dad

my friends dad is really hot. no joke. I've thought so since high school (I'm a junior in college now). I really want to have sex with him and I know things aren't going so well with my friends mom so I don't think it would be too bad if anything did happen... I just feel really confused because I've always felt like we've had a connection but I think he holds back cause I'm younger and his daughters friend. what should I do??