i try

you may not be her 1st,her last,or her only. she loved before, she may love again. but if she loves you now, what else matters? she's not perfect- you aren't either, and the 2 of you may never be perfect together, but if she can make you laugh, cause you to think twice, and admit to being human and making mistakes, hold onto her and give her the most you can.

or

i may not be their 1st, their last, or only. they may have loved before, they may love again, but if they love me now, what else matters?they aren't perfect-neither am i, and the 2 of us may never be perfect together, but if we can make each other laugh, cause the other to think twice and both admit to being human and to making mistakes, i hope they hold on to me...because i will hold on to them and give me the most they can...because i will give them the most i can.