I like a girl but I'm scared and confused because I'm a girl too

Hi, sorry if there's any errors english isn't my first language

I turned 18 a month ago, my whole life I never got the freedom to go hang out with my friends I followed every rules my parents set, I was top of my class but now that I'm a senior I feel off because I feel like I'm not living my life my parents controls it like they're the one living inside of me, my family is very religious, when I was in elementary school my friends would talk about boys and crush whenever they asked me who I like I just say a random boy in my class. My friends would invite me to play great outside but my parents wouldn't allow it because what if we go on a date with boys blah blah blah

High school started someone my friends didn't talk to me now cause well I'm basically a boring friend, my social anxiety started. 9th grade I was basically alone, I got some friends sure but only school friends, I tried to date boys but it just doesn't sit right with me like whenever I stare or think about them it's just nothing.

11th grade, I got new friends started to get more confident about myself, but still didn't like get to hangout with them I always say im busy and shit and my confusion started one of my friend ask if i like girls because she's bisexual and I said yes and accidentally slip out and said one of our friends name that I got a crush on. Well maybe I was just amazed of how good she is at sports cause she's an athlete. I was in denial about liking girls because my best friend is kinda homophonic along with my fam

Now 12th grade but feelings didn't go away it just got deeper, i don't know if she likes girls or boys cause she's like idk how to say this but she's like a tomboy, since 11th we have gotten close and she's been clingy. We hold hands hug things couple do. We were practicing for a performance task in PE and needed a trainor so we got one, I remember we were holding hands and our gay trainor clock us he was looking at us suspiciously and just say "are you two lovers?" Bro he was smiling ear to ear but well she drop my hands in a teasing way. But after seconds she was back holding my hands like dude what the fuck was that.

Yesterday we fisnish our exam it was tiring of course and she hugged me after i got out of the classrom cause she was finished first, my heart skip a beat. I got confused again. Whenever we go out like drinking alcohol she's always beside me guiding me, she knows how to drive a motorcycle so she's always bringing me back home. My problem started when my mom ask me about boys marriage kids and shits. I got no balls no say I like girls, so now I'm on house arrest because she thinks whenever I go out with my friends now I go on a date mind you I'm 18, still a teenager but I know what's wrong or right, because since I was a kid I was discipline, I'm basically raising my sisternow guiding her today because my parents are chill with her but on me they think I'm a child, I'm upset cause now they're grilling me about keeping secrets about boys boyfriend and shits so now I go and rant to my best friend who I met in 10th grade but gosh she is so fucking homophonic with her responses to my rants now I'm basically exploding because I got no one to talk to. even if I just out myself now they won't believe me. Is it a sin if I like her?

I feel like I wanna rest now.