Does my brother's best friend like me?

My brother is 16 and he has to really close friends. Thing is they have the same name, so say their names are Ben, it would be little ben and big ben. I know its silly but thats how we tell them apart. So big ben is 15 and little ben is 14 but is turning 15 in like 2 weeks. A few weeks back when big ben and my brother were upstairs playing video games, little ben and I were downstairs watching a movie. it was a really funny movie and i laughed a lot. he told me I had a nice laugh and I looked away. Since we were on the couch, I had a blanket around me. He scooted closer and got in the blanket with me and rubbed my legs. I pulled my feet out and went to the kitchen he followed me. I was joking around with him as i said what was that you perv? he said , eww you're just a little girl even though he's only a year and some months older than me. a few hours llater when we were watching anothre movie, you acted like he was sleeping and slept right next to me. he leaned over and his hand landed right on my boob! i laughed and moved his hand. he looked me right in the eyes and moved closer. I turned my head the other way immediatly. now just yesterday was his last day here before he is leaving to visit his grandma. All of us went swimming exept for "Big Ben". I'm not a good swimmer so I was more in the shallow end of my pool. my brother and ben dived and swam as i just watched. how after my brother got out the pool it was only me and "little ben''. he swam closer to me so I swam away. It was too deap and I started to go under for no reason. He was pulling my leg and grabbed my butt ! I went under and saw his face. as we went back above water he was about 8 inches from my face. he came closer again so I ducked under water. he carried me in the water and he touched me a lot knowing i was only wearing a bikini. now he left and i have been wondering about it all. help? but he keeps saying im a little girl even though he dated a girl my age too! oh and im 13