Listen up, bis, gays, ..here me out?

i'm in first year university..dealing with really heavy course loads...and i have feelings for girls and none of them feel the same way, and i just can't come out because 1) it's not an option 2) i'm not 100% sure 3) i need more experience on this matter, physically. i'm sure you all know what it's like to be alone/left out at some point in the beginning. it's getting in the way of everything, my friendships, my schooling, my mental being. guys..i'm really stressed out. don't know how much more i can take.