If your son has actually said he hates you, ask him why. You’re both adults; you should be able to talk. But I suspect perhaps you feel like he hates you because you see much less of him. Yes, it is nice that you miss your son’s company, but he’s a married man now with a whole new set of priorities. If you try to compete with his new wife for attention, I’ll bet his wife wins. You need to get used to your new role.
Go for quality, not quantity when interacting with your son from now on. Respect his commitment to his marriage, and look forward to being a grandfather. That’s when you’re likely to see more of your son. Most kids love seeing their grandparents, and your son will suddenly have more in common with you.