First of all dear, there is nothing to be apologising about. You also have your personal life and will have your own emotional battles to fight. It is normal and natural and as your readers we stand by you.
Secondly, I know it is better said then done. Itna aasan nahi hota, kehna aur baat hai aur is cheeze se guzarna is on another level. But please try and come out of your emotional baggage, it is not good for you. Never give that power to anyone which can hurt you emotionally. Yes, definitely the people you talked about were very important but think for once, did they prioritize you and your feelings? No! Right, phir unko yeh mat satisfaction hone do that they were able to hurt you. For your boyfriend, in one week he didn't get time to msg you if he was going through something? Think wisely. For your friend, she knew how important she was for you, did she care? No! Feelings and friendships are always mutual.
Now, try and make yourself so strong emotionally not to get disturbed by this.
I am saying this because I have been through this friend situation. She was with me since last 10 yrs, we had a very beautiful friendship, always there for each other and the one where we could share anything and everything. But one day it all changed. She hurt me very badly, it drained me out.
I sat in my room and analysed whether to give her the power, it felt worthless, then I decided that she is no one to me jo mujhe emotionally tod sake. Once I decided, I felt relaxed. She came to me after 3 days to mend the situation, apologies and all. That time I told her "tujhe dost Mana tha, but you are not worth it, now even of you jump from the 10th floor, I wil not even flinch. " Her unbelievable expression of shock and feeling desperate was worth watching.