<human>: Can you condense the text into a few key points?

So me and my best friend ever are 16, (we're male) and he has a girlfriend, (well call her sara) Anyways she's known to cuddle, as she really liked to do it with us even when my bro (from another hoe) wasn't in a relationship with her. So we all know he lost his virginity to her. And i haven't lost my virginity, and i dont think im ready to loose mine tbh, since im not grown much in the nether regions. anways 'sara' usually cuddles and stuff up on my best friend but sometimes she'll cuddle with me as well since we're really good friends. Some times she'll give me a kiss on the head or something no big deal, but today while my bro was dealing something else, i was half asleep on my bro's bed, along wit 'sara' next to me. She then goes into cuddle position (which isnt unsuall since theres nothing sexual going on) but then she straight up gets on top of me (im belly up, so my dick is grinding with her (we also are fully clothed)) and i get a boner naturally which thankfully veers off the right where is isnt being crushed, but im 99% she knew i was hard and she didn't do anything about it. she also held me very tight and was really grabby at the neck hole in my shirt, what im trying to get across, it was really really racey and sexual. When my best friend came back she obviously got off me to go be with him but she seemed really into what we did. I dont have relationship or sexual experience whats so ever so im really confused and feel bad becaause, i sorta have feelings for sara but i cant just steal my best friend's girl. What should i do
<bot>: While my best friend's girlfriend was gone she cuddled with me, and it got really sexual and im super confused what it could mean