Unreasonable rage & jealousy when my partner is with others
My heart feels like its pounding in my chest and I know I am unreasonable to feel this way, but anytime I get any kind of hint that my partner is hanging out with other people (namely, his friends) I get so fucking jealous and angry. I try my best to not let it show, but we have had arguments about this in the past because of miscommunication from us both and my inability to manage my negative emotions.
He was originally super clingy at the beginning of our relationship whereas I was aloof, but as I warmed up to him overtime we slowly started spending majority of our free time together. We had shared each other's locations at one point, and I notice he'd by out at a boba tea shop or fast food joint, and he told me he was with family. He much later admitted he hung out with friends behind my back and it hurt me so fucking much, especially because I told him how I feel like he's my closest friend and I'm sad that I don't have friends / a friend group like him. I felt betrayed because HE used to want MY time and affection so much at the beginning. I am envious he has friends which I admitted it to him, not in a way that I blame him but in a way that I'm just sad and wish I had close friends too.
I recently found out, from his fucking friend's post on instagram, that they hung out together again because he was constantly being posted on his friends page. I felt so hurt, so angry, and just betrayed. I did lash out on him, regrettably. I was just mainly upset that he does it without telling me because I am constantly monitoring for his message or when we can next hang out and it makes me sick - I feel like a stupid fucking useless puppy waiting for its owner. I communicated how much it upsets me, he apologized, but I still resent him for this. Its stupid that this triggers me so much but all it does is remind me how I feel like I am no one's first choice.