With all the popularity of four liners lately, I figured I'd contribute. Since my recent riddles seem to have been too hard, I'll err on the side of ease this time. Determine what each line is describing (each is a single word) and what the commonality is.
I'm depending on you.
I'm lost in your eyes; there's just something about them...
I'm one of many, rarely referred to individually, but just look inside and you'll find me with the others.
When the previous word's done with you, come see me!
ADDENDUM: I've discovered that there is a 5th word that also shares the common bond of the previous 4. I'll add it here in the interest of making it perhaps easier on you:
A sailor's friend, I'm the concatenation of two words (slightly ironic because the first is not known to play well with the second).
All 5 of the words are anagrams of each other. These words are 7 letters long each.