What does it mean when a guy kisses you on your forehead?

my friend,he's really sweet! from what ive seen!...he's like aproxemitly 25 & im 15 when i saw him i came up to him to hug him and he kisses me on my forehead before hugging me, and i hurt his nose & mouth because i ran up to him too hard. so he kisses me on my forehead again this time no one got hurt and it was more smoothe going like gentle. and both times they were both like 3-5secounds kinda juicy kisses..what does that mean? does it mean he likes me? or interested in me? or does he think im pretty? or what?