Self hatred and insecurity

Hi, I’m not really sure how to put this out without sounding depressing and I don’t intend to make this post for attention and sympathy. I have had issues with my appearance and body and I hate everything about myself... This has been happening since I was 8 and I’m 17 now. I can’t look at myself, in mirrors, on my phone I guess you understand where I’m going. I realised something was really wrong when I wanted to lose my virginity to my boyfriend (sorry if this is TMI) but I feel like I won’t take my shirt off. This isn’t an issue of what my boyfriend would think because he’s sweet and understanding but it’s rather about, how can I overcome this self hatred? Is there a way I can lose fat easily and effectively? Thank you