my bf thought i was a virgin when we had sex but i wasn’t

I can't see what your problem is tbh

how do you mean?

not long before me and my bf started dating he briefly asked me if i was a virgin during a conversation and i don’t remember this very well but i know i didn’t say anything for a few seconds because i didn’t know what to say. i had lost my virginity about a year beforehand with my first bf but i regret this as we were both quite young and he wasn’t a nice person and pretty much pressured me into it. anyway my bf assumed i was a virgin (he was as well) and i think i just nodded in response or something along those lines. me and my bf became sexually active a few weeks later and it never once crossed my mind about my past till recently when we’re well into our relationship. i have no idea what to do. i feel awful as i have never lied to him about anything before. we never argue and have a very healthy relationship but i have started feeling guilty about it. any advice appreciated x

update: i told him as i simply couldn’t handle the anxiety even though i’ve tried telling myself that it doesn’t matter and is in the past. turns out all my fear wasn’t needed anyway as he wasn’t angry in the slightest. i already have sexual trauma from this first bf and other things which i obviously won’t disclose so he was very understanding of why it has only recently emerged (we’ve been working on my trauma together) and just wanted to make sure i was okay. he doesn’t mind that my first time wasn’t with him as my first real, special one was with him. thank you for any responses x

Let him think whatever he wants.
You haven't told him anything about your sexual history.
Nor lied to him.
Your private life and prior relationship history before you started seeing him is not relevant to his life.
Nor to your current relationship.

Lying by omission...

update: I told him as i simply couldn’t handle the anxiety even though i’ve tried telling myself that it doesn’t matter and is in the past. Turns out all my fear wasn’t needed anyway as he wasn’t angry in the slightest. I already have sexual trauma from this first bf and other things which i obviously won’t disclose so he was very understanding of why it has only recently emerged (we’ve been working on my trauma together) and just wanted to make sure i was okay. He doesn’t mind that my first time wasn’t with him as my first real, special one was with him. Thank you for any responses x

Nope.
Lying is via direct words that are spoken or written with dishonest intent.

The last ex kept his sordid high risk sexual antics with sex workers secret from me.
His behaviour was disgusting and he put my health at risk.
But he never lied to me.

not long before me and my bf started dating he briefly asked me if i was a virgin during a conversation and i don’t remember this very well but i know i didn’t say anything for a few seconds because i didn’t know what to say. i had lost my virginity about a year beforehand with my first bf but i regret this as we were both quite young and he wasn’t a nice person and pretty much pressured me into it. anyway my bf assumed i was a virgin (he was as well) and i think i just nodded in response or something along those lines. me and my bf became sexually active a few weeks later and it never once crossed my mind about my past till recently when we’re well into our relationship. i have no idea what to do. i feel awful as i have never lied to him about anything before. we never argue and have a very healthy relationship but i have started feeling guilty about it. any advice appreciated x

update: i told him as i simply couldn’t handle the anxiety even though i’ve tried telling myself that it doesn’t matter and is in the past. turns out all my fear wasn’t needed anyway as he wasn’t angry in the slightest. i already have sexual trauma from this first bf and other things which i obviously won’t disclose so he was very understanding of why it has only recently emerged (we’ve been working on my trauma together) and just wanted to make sure i was okay. he doesn’t mind that my first time wasn’t with him as my first real, special one was with him. thank you for any responses x

Nope.
Lying is via direct words that are spoken or written with dishonest intent.

The last ex kept his sordid high risk sexual antics with sex workers secret from me.
His behaviour was disgusting and he put my health at risk.
But he never lied to me.

Lying by omission, also known as a continuing misrepresentation or quote mining, occurs when an important fact is left out in order to foster a misconception. Lying by omission includes the failure to correct pre-existing misconceptions.

That’s not really true. You can lie by omission or concealment.

If you asked your last ex whether he currently did not have an STD and he nodded in response or something along those lines, but in reality he knew he did, then he lied to you.

Well done for telling him. Don't listen to people who tell you to lie to your bf. Always be honest and truthful with the person you claim to love.