I luv him but do he luv me?

we have 2 clases 2 gather and in one of our cles the teacher pared us up 2 gather cause his partner waz movin. well in that cl he he said he was glad that the teacher pared us up. and he is always ticklin and touchin me(not in bad plases) but in the other cl he like totally ignores me. i took my phone to skool friday and he took a picture of him self and put it as my wall paper..what should i think??? does he not want his friends to know he likes me or am i just fun to mess around wit??? help i really need it!!!