Does he just want me for x?

okayy so theres this one guy that i met from one of my friends and at first he was a really good friend and i felt like tht i can tell him anything and he would always give me advice like dont have sx and sht lke that lol bt now he wants me to like send him naked pics and have sx with him and i just dnt get it hes the one tht told me to like not to do that with someone u dont love and everything he was so nice before and he even tld me he would like try to have sx with girls bt tht he changed and stuff like that and hes one grade older then me and hes nt even a virgin so i dont know if hes just trying to do it with me now so does he just want me for sx??