I was like you too I randomly had a crush on this guy then I started felling in love with him. but now were strangers something happen and I dont think he can take it back now I did everything I can just to make him talk to me I also send him text messages and also a happy birthday but he avoid. oh well. now I still see him it kills me inside but yet. everytime we walk passed eachother we look away like we never talk before. it hurts, but to be honest I still have feelings for him .
No dont give go after what you want, in South Africa we say "umuntu utholwa emuntwini " it means All. the love ones are taken but still go after them.!! you dont no may he will be unhappy
..no, it is just lust..and that is OK.. you are young, and well, will try experimenting...also, you might feel a bit lonely and want something to drive you...but in the end, it will not work, so just move on.