How can i get my 15 month old to sleep through the night without waking up?

My son just turned 15 months and always has been a terrible sleeper, when he was younger he was extremely gassy but now he is healthy and haven't had that issue in a long time. I stick to a steady schedule of waking up at 8 A.M., breakfast, snack, lunch at 12, then 2 hour nap, dinner, snack, bath time at 8:15, brush teeth, p.j.'s on and bottle before bed which he doesn't drink that much he drinks a quarter of it and knocks right out i place him in his crib on his back, night light left on. He is in bed the latest 9:30 asleep. He wakes up crying around 2 A.M. and im afraid my neighbors might hear him crying and my husband works very long hours 6 days a week so i take him out the crib and put him in bed with me but i don't want to continue to do this. Should i be giving him a bottle still before bed? Should i just put him in his crib and tell him its time for bedtime and let him cry to sleep? What should i do if he wakes up? He has most of his teeth already at least most have popped through the gums so i ddon'tthink its to much of teething any more he is just a little bit of a wwhinerand i give in to him alot twhich i shouldn't but i ask the doctor for advice and she doesn't give me that much at all. Nap time should i put him to bed in my arms and place him in his crib or should i just put him in the crib and tell him its nap time and let him cry it out. Usually he takes a nap on his little foam sofa that he has a bottle of milk and watches nick jr. and falls asleep on his own. I been trying to try different ways just don't know which way is best.