HOUSE: […] Yes, [Chase has] been dating at a near-Clooney pace recently, but at this point, the only hole he's trying to fill is the one in his soul, which means it's the emotional connection with Cameron that he misses.
WOMAN DOXING CHASE: When we were talking, you seemed like a nice guy. So either you're a great actor, or you're a nice guy who lost his way.
PATIENT : Haven't you ever done something in a relationship you wish you could take back?
CHASE : Maybe.
PATIENT : How'd you handle it?
CHASE : I told the truth. Eventually.
PATIENT : How'd that work out?
CHASE : Not well.
CHASE: My time here changed me in ways not everyone in my life thought was for the better. […]
MASTERS: Were those people right?
CHASE: I think when you do change, it's not so simple to go back.
CHASE: I think you're stuck. Last month or so I've turned my life around. I'm happier than ever.
FOREMAN: Sleeping with ten women instead of four?
CHASE : Try none. […]
FOREMAN: […] None?
CHASE : Was having tons of sex, and I was bored, hating myself. Was never gonna be ready when something real came along.
[He sleeps with a nurse at the end of this episode, and looks conflicted about it.]
ADAMS: Do you think people can change?
CHASE: No. But I don't think that's gonna change your opinion, because… people don't change.
HOUSE: You can do anything. So you come back to the same building you've worked in for years. Guess you can cross that off your bucket list.
CHASE: Can we get to my patient sometime soon?
HOUSE: As soon as you admit that you're a confused mess, sure.
HOUSE: Or you're terrified of intimacy, which is why you're a serial slut. But right now you're grasping at an emotional life raft. Ideally someone for whom intimacy's not an option.
PARK: You were jealous of me. My family.
CHASE: Maybe you've got too much, and I've got too little.
CHASE: I have meaningless sex with random strangers. Thanks for the insight, but I stopped that months ago. I actually had a relationship.
HOUSE: With a patient. You just date whoever happens to cross your path.
CHASE: My dating is getting in the way of my dating?
HOUSE: You don't go looking for the right person. You just shack up with whoever's in the room, and then you get surprised and/or divorced when it doesn't work out.
anyway, chase's dumb whoring as a symptom of his loneliness. his immediately falling for cameron at the first scrap of affection as a symptom of his loneliness. he sleeps around after his divorce and then stops. he sleeps around after his stabbing and then stops. it takes him a long time to get over his divorce -- there's a running theme of him wanting to change, feeling like he can't, that no one can, that it is a problem, that all he can do is what he's stuck doing, but he keeps attaching to the first people who show him affection (which he mostly interprets as sex) because he doesn't know what other relationships look like.