K.N.
Hey K.,
I think you should use that as a goal to get him potty trained by August. Somewhere people have decided not to push our kids (maybe because it is less work for us to wait for them), but we aren't setting goals for them to meet either. By 2 1/2 he is very developmentally capable of potty training. If you say he has no interest in the potty then start off slow. Make it fun to go potty. Try getting a cool toilet seat, I saw some at walmart that looked like baseballs, footballs and basketballs for not that much and they also make your favorite Nick Jr. characters on potty seats. Let him pick it out that way he knows it is his! Explain to him that the seat is so he can go pee pee and poo poo in the potty. Or this sounds silly, but let him flush toilet paper down the potty and tell him YAY!! While you talk about going pee pee in the potty and flushing it down too. Watch him carefully and he will show you some cues as to what interests him in the potty. They make games for little boys on how to "aim" or use cheerios. Its something fun that they would enjoy. Even when he goes in his diaper or pull up take him to the potty and say pee pee in the potty. All of these things get him interested and talking about it will stick in his head so that when he is "ready" he already knows where pee pee goes and how to flush and so on. Try incentives like stickers or stamps and if he tries to sit on the potty, even if he doesn't go, give him a sticker and yell YAY. That way he sees that it is a positive thing and he gets praise when he tries. Trust me if you start that now, you will be surprised how little time it will take to get him interested!
Or you could try what I did with my daughter who is 20 months. Last month she started noticing the potty so I started letting her run around with no diaper on at home and now she is very aware when she pees. Only a month later, she tells me when she needs to pee and poop and most of the time she goes on the potty. We still have a long way to go, but that method worked for me :)
Good Luck and I hope this helps!!