Trust and Respect are a big part of any relationship. Tell him how you will always be there for him, thru thick and thin. Always give him the benefit of the doubt. telling him are only words, but showing him will make an impression. Truly respect one another. Don't ever say anything out of anger. Think things out first, then choose your words wisely. It may be hard, but so worth it. Tell him where you see him in your relationship, thank him for being there for you. Tell him how important he is, and has been in your life. Fluff his feathers. I'm sure any praise from you will go a long way. Good Luck
i'm 16 too and i know it can be hard to let him know how much you really care. the truth is, if it's REAL love, you'll never be able to merely say something to relay the message; but, he will know because he will feel it in his own heart.