I like #1 alot, his mouth area looks a bit dark...
#2 I would crop the top down quite a bit..., but like it...
#3 collage, all 4 are nice, but I love lower right shot...playful.
#4 not crazy about this one. She looks like she needs to poop, he looks uncomfortable, perhaps cause he thinks she needs to poop also. 
#5 Love it
#6 Points for bravery, but seems trite.
#7 Love it- Looks candid, spontaneous.
#8 Like it, but seems too far out...Might for me work in silhouette..
All in all, diverse poses, cute couple, looks like they had fun. Nice job..
Aspiring SemiPro- Canon 7D/8mm Sigma Fisheye/20 mm Canon 2.8 Wide/50mm Canon 1.8/100mm Macro Canon 2.8/70-200 ii Canon 2.8/580ex/MR-14EX Canon Ring Light