Someone please tell me Wat to do???????

Ok so theres this boy I really like called lenny and I know
That he doesn't like me cause he tells everyone that he doesn't. But he acts like he does eg. He puts his arm round me, comes round to my house for a party, texts me, and just talks to me and tells me about myself. I have asked him out a few times but he Always rejects me, he has asked me out but I thought it was a joke so I 说 no. He best mate bobby who stalks me eg. Texts me everyday, tells me He loves me, gets really jealous when I talk to Lenny and always Asks me out everyday. I really don't like bobby and he knows
I fancy Lenny, but he still won't leave me alone. Anyway can someone give me 建议 或者 tell me why Lenny acts like that if he doesn't like me. It would be appreciated xx thanx xoxo