I (M21) am uncomfortable with the way my friend's (F20) boyfriend (M20) seems to be hitting on me and I'm unsure what to do

Alright I'll try to keep this short.

My friend = Karen
Her boyfriend = Dan

​

So Karen is my Gf's best friend, we've known each other for years. 7 months ago she got together with Dan, who started going out with us and with whom I've got along greatly from the start. As time passed we've become great friends and often go out just the 2 of us.
In the last two months Dan started to bond a lot with me, talking about private stuff and being very affectionate and physical with me (hugs and whanot). No problem here, I'm very affectionate as well. Though another thing he has done is being very... sexual? I'll explain with a few examples

• He fake moans when we hug or joke around (like pushing each other) and says things like "stop or things will heat up too much"
• When he drinks a bit he makes a lot of jokes about threesomes with me
• He will sometimes take my hand or walk while his hand is on my shoulder and say things like "we make a nice couple eh?" and laugh it off
• We went on a double date, at the end me and Dan went to get the car while our GFs went to the bathroom. When we got in the car he said "you know, there's a lot of things one can do in a car" and I just laughed not knowing what to say
• We were at the bar, sitting with other people. I was in front of him, and my knee would sometimes bump his knee so I said "sorry about that" and he said "no worries" and then patted my knee and kinda stroked it for a second (it was weird)
• We went to the beach together with our GFs. The beach had showers so we decided to take a quick one before going. I see him go to his car, open it, pick up 2 bottles of body wash, staring at them, put one down and come to me to see if I was ready to go shower. We entered the bathroom area, which had closed showers, and he starts saying that he forgot the second bodywash and that we had to shower together. I said not to worry and went to pick up my own from the car.

I don't know what you get from that, but I'm pretty sure he's at the very least bi-curious. I'm unsure what to do. I can't deny that what he does makes me uncomfortable, especially since our GFs are best friends. Like what am I suppose to tell him? I'm afraid I'll ruin our friendship or hurt him. I know how rejection can be tough on closeted people (that is if I'm right and he is attracted by men) and don't want to hurt him like that.
I'm trying to think of a tactful way to address this but I'm unsure.

TL;DR = Dan is the boyfriend of my GF's best friend. He's been acting in a weird sexual way towards me and only me and I'm unsure how I should address this.

Submitted August 29, 2018 at 04:01AM by Feanoe https://ift.tt/2oksyqv