Have you ever dated someone who suddenly started to drift away from you … and you weren’t quite sure why? Well, that individual may have been suffering from an intimacy disorder.

“Being close with another person is actually a much taller order than people understand,” HLN’s Dr. Drew said Monday night. “For some people, they can only enter closeness through, kind of, manipulating and controlling the situation. “

He added, “If somebody [has trouble] sustaining or tolerating closeness, and they either go for people that are unavailable all the time or sabotage relationships that are available, that’s an intimacy problem and that’s a great place for therapy to do some magic.”

Watch Dr. Drew Monday through Thursday at 9 p.m. ET on HLN and follow the show on Twitter @DrDrewHLN.