I hung out with my ex's best friend, opinions?

7barbieringz
First some back story, I met this guy like a year ago (the best friend) and ever since I met him I kinda felt like he was very... flirty. But I was never sure, and thought maybe he was just a touchy feely and really nice guy.
Here is a little backstory of things that caught my attention:
• Every time he sees me he ends up standing or sitting close to me
• He hugs me everytime he sees me, but he hugs everyone
• He has laid his head down on my lap a few times, when I was laying on my friends bed he would lean on my legs to prop himself up.
• He touches me a lot, like brushing my arm or hand, and resting on my legs, getting things out of my hair, once I had something on my inner thigh and he brushed it off. Or he laid his head on my shoulder while laughing
• He asked for my number multiple times until he got it
• he teases by bothering me until I say the "magic word", or playfully punching me.
• He has talked about how my boobs multiple times, asking my bra size and saying they're huge
• Friends have said he asks/talks about me often
• Friends have said once before that he treats me differently than other girls.
• He recently got a new girlfriend even though he has a girlfriend now he still did all those things
• he got me a necklace for my bday from an anime I like

So, after all this the other day we play a video game and he said I needed training and offered to train me. He basically insisted that I come over and was like really happy about it. And the night before I came over we talked on the phone for like 5hrs, he said he really enjoyed talking to me.

When I got to his house to hangout, it was fun we played the game and watched movies. But he wasn't as flirty as he usually is. After I left I went to visit my ex, cuz he lives super close to him and best friend literally shows up at my ex's house right after I left his house. He didn't stay long because his girlfriend was coming over.

I would just like opinions on this, I feel like this is kinda.. strange
I hung out with my ex's best friend, opinions?
4 Opinion