sex until marriage??

i jus wanna know what y’all think. i’ve had sex before with my boyfriend as a teen because i thought i was ready. i regret having sex with him, but is it ok for me to tell my future boyfriends that i want to wait ? and if i do, would i have to disclose that i’ve had sex before ? i feel like some people would take this as unfair seeing that i have had sex before but want to wait with them and they might take it personally ? what do you all think ?