so i like this boy at school. he is a freshman and i am a junior.

we flirted when we first met, but then we stopped talking all together. all though we stopped talking i still caught him staring at me. A lot. when i asked him what was up and whether he wanted to be friends he immediately said yes and then talked to me, ignoring his friends, until the buses came. what does this mean? also, i really like him, so what should i do next.

basically i want to know:

What his actions mean

and what i should do? (flirt, be friends...)