I can’t stop getting off to my roommate and her new buddy [FM]

She has no idea and I don’t know how or if I should bring it up to her but my roommate Kelsey’s and her new fling has been my source of masturbation material for the past 3 days.

A bit of the back story, we both play University Hockey and have lived together for 2 years. Kelsey is stunning, single and the team party girl. I’m recently single, broke up with my shitty ex after finding out that he was cheating on me. Trying to play the field I guess but have been finding it hard to balance school, hockey and dating. I’m more of a homebody and like to go to the gym or relax in the evenings where as Kelsey is meeting up with guys off tinder and going to the bar most weekends. Lately she’s been dragging me with her to the clubs and it’s been fun but just not really my scene, the attention and free drinks are nice I guess.