I have the mutant and Christine in position but Dean refuses to follow me, i've talked to him with every option he has but wont move... How do you get him to follow you ? I really hope this didnt glitch out because that mean i have to start ALL over again...

Have you checked the wiki? http://fallout.wikia.com/wiki/Dead_Money

What quest are you on? Positioning them, so Dean is at the fountain?

he has got to ge a follower and he will say he knows an easier way out so follow him