He should know that...

"You aren't going to be her 1st, her last, or her only... she's loved before; and she will love again. But if she loves you now, what else matters? She's not perfect -and you're not either. If she can make you laugh and if she admits to being human and making mistakes, hold on to her and give her the most you can. She's not going to be thinking about you every moment of the day, but she will give you a part of her that she knows YOU can break - her heart. So don't hurt her, don't change her, don't analyze and don't expect more than she can give. Smile when she makes you happy, let her know when she makes you mad and miss her when she's not there. Because perfect girls don't exist, but there's always ONE girl that is perfect for you."

-Anonymous