Fathers and sons can be tough sometimes. I myself am going through a very rough time in my relationship with my grown son. Whenever I "talk" to him (usually not spoken language, but e-mails), I remind him that regardless of what's going on between us, that my unconditional love is the foundation, and that it will always be there. I try to model our relationship after the one I have with my Heavenly Father. I know He loves me, but he still cracks me on the butt from time to time when I mess up, and won't give me every shiny new thing that drives down the street. Keep the relationship in prayer, and be consistent in your dealings with him. Don't try to purchase his love and respect with video games, bikes, or whatever. As he grows more mature (I'm guessing he's still a kid), he will see you much as you see God; a benevolent loving father who can be counted on to behave in a consistent manner that will help the boy grow into a man. Just a note so you don't misunderstand...I still don't get this stuff right, because sometimes my pride, or ego gets in the way of what I know God's telling me to do, and if I could do all the stuff I tell others to I'd have a perfect plastic family I suppose. So keep on pluggin' away and give it to God, but don't stop listening for that still small voice.
If you need an ear to bend, lemme know. I'm only about 10 miles down the road you know, and I've had an extra ten or twenty years of being beaten down by the world, so if there's stuff that's messin' with you, I've likely "been there, done that".
Keep your chin up. This too shall pass in God's time.