Boyce Avenue – Just Cant Get Enough tab

My first tab, and I cant work out the bass note if you can, get in touch with me, I'm 
very open to your suggestions!:D

e|--------------------------------------------------------|B|--------------------------------------------------------|G|--------------------------------------------------------|D|---3----1-----3--1-----3-----1-----6--1-----------------|A|-7---7-----7--------7-----7-----7-----------------------|E|--------------------------------------------------------|