How can i stick pictures on my wall?

I want to cover my wall with pictures of me & my friends (4x6 pictures) & i have tried everything. double sided tape, masking tape, scotch tape, and they all fall down the next day. My walls are painted with a gloss coat if that helps . i dont want holes in my wall or anything & i dont want the paint to be ruined when i take them off. is there anything that i can use that will keep the pictures on but not ruin the paint? PLEASE HELP !