advice on my life

hi so i’m 17 and am not very familiar with this whole thing. my boyfriend of six months broke up with me a few months ago. i had only kissed other guys before but i did everything with him. all of my first were with him and the things i did to him were my firsts too. there are a few things i’d like to have help with. 1) i got used to doing these things and i miss it. i don’t feel comfortable with other guys but i want to pleasure myself. how should i do this? 2) i want to make sure for the next person i’m with that i’m good at what i’m doing. before i became pretty good at blow jobs but it’s mostly luck. i just need some tips on how to get good and be confident when i’m doing shit. 3) i need to get over this guy. i haven’t been able to yet. we dated for six months and he became my best friend. we broke up because he was a mess after two of his friends passed away and he said he wasn’t able to give me what i needed and stuff like that. a few weeks before he did this i came out to him and my parents about how i had been feeling depressed for a very long time. three days after we broke up i was diagnosed with depression and anxiety and i left my school for three months to get treatment. my two best friends started ignoring me and i lost them as friends. i did make some amazing new friends who i love but don’t go to my school. anyways i need to get over him. my life has been a shit show the last few months. i just want to talk to him and have my best friend back. i still love him and i have this emotional and physical bond to him. he was all of my firsts. and when i was younger i was sexually abused by my classmate and neighbor. both of these girls i trusted and they took advantage of me. the reason i’m holding onto this guy extra is because i refused to trust anyone after those events. and when i did i fell in hard.