should i tell my mom i lost my virginity?

so i lost my virginity at 16 with someone that was not my boyfriend and ever since then i have continued to be sexually active (i’m turning 18 this year). after i lost my virginity i was talking with my mom and she said to me that she couldn’t imagine her 16 year old daughter being sexually active, and at that point i just couldn’t bear to tell her. but now i’m heading off to college soon and she still thinks i’m a virgin and it’s killing me inside because she just wants what’s best for me but i know that if i tell her now then she’s gonna be extremely mad at me because i’ve had sex with all these guys behind her back. i just don’t know what to do. help. :(