he is blue pill, always tries to impress women, and talks down to me when women he likes are around. Basically, he tries to c*ck block me. Don't get me wrong, when its just guy's around he treats me great. He may have an inferiority complex with me because I am 4 inches taller than him and he is bald and I have almost all of my hair.
now, now, I had a colegue like that, he was the "funny"(not really) kind of guy pretty patetic, thing was any girl we meet, even if he couldn't pull, would try to do that try to make others smaller so he could look better, thing is fools like this are the lost kind, he don't follow the bro code, and is a patetic loser, what I did was to cut him of and laught on his face on how patetic he was, last time I did talk with him and he tried to look like the bigger guy I laught at him and said I felt sorry for him, he was pissed like hell and didn't bother me again.
so TLDR, cut him of your life and if he gravitate around you are try to ****block you again put im on spot and make fun of him.
guys like him are like females, like you said he is not trustworthy, he is willing to sell anyone for the group he want in, because he is a follower and need others to feel secure, so cut and move on