fear of sex after sexual abuse

i was secually abused by my first boyfriend (14 y/o) and i really didnt handle it well. my next relationship was really fundimantally bad,our personalities didnt work and i was deeply in my Anorexia and having panic attacks so having sex wasnt really working... Now im in a new relationship with an AMAZING guy (for 1 month), i am doing better with the food but im still traumatized and terrified to actually have sex. intimacy easily cab give me anxiety..He probably think that i did it with my last bf and im not ready to tell that it wasnt the case..he knows about the abuse tho. im later going to a proffesionall w this. i dont know how to handle this. please help and/or share ypir experience♡