I'm completely new to the whole concept of BDP, having recently been diagnosed in the past couple of days due to a month of self harming, suicide attempts, alongside days where I've felt larger than life and have been fluctuating between absolute high and low. 

I and am currently living with my ex boyfriend, who I've still remained close friends with. Big mistake. He has decided that he wants to give me space during this 'tough' time I'm having, and is now starting a relationship of some sort with the girl I live next door to.. There's 8 of us in the house, and the other 6 are being really supportive, I have an amazing support system. So why can I not stop obsessing, like genuinely obsessing over this? I have moved on with another boy, kind of, but I'm unable to commit to the idea of him being a 'boyfriend' due to these feelings for my ex. I am so painfully confused, and so annoyed at myself for being upset over something so petty. 

I can't concentrate on my studies, on my work, on my very near and upcoming graduation and future plans. I feel so empty, and I really cannot get over that somebody I loved and trusted as my best friend, has picked somebody I can't ignore him being with instead of trying to support me through this really confusing and difficult time. Reddit, am I being selfish? I guess I know I am. I just feel so much unnecessary pain all day, every day. 