House Trained Dog Started Peeing on Owner's Pillow?

My baby, Maycen, is my best friend, we very rarely have to get on to him. He is 1.5 years old. I've recently become lost on what to do because he's done great telling us he needs to go out and he loves how excited we get after he's went outside. I think that's one of his favorite things about going potty outside is how proud he feels when we go back inside and he prances around like "he's the man."

He sleeps in my bed and follows me if I get up for any reason, he's always by my side. About 2 weeks ago I got up in the middle of the night to go get a drink and came back to my room and he's urinated all over my pillow at the head of my bed. He's never done this to my husband's pillow just mine! Its happened about 10 times in 2 weeks and it's happening more frequently. I want to stop it before it becomes a habit, but don't know what to do. I don't believe in hitting or spanking him. When he does this, as soon as I start walking back to my room, he see's me and takes off running, then I know he's done something before I even know what it is, he always tells on himself :)

I've started making sure he's with me when I get up in the middle of the night and making him go outside to see if he needs to go, but he's now been going on my pillow any chance he can sneak away from me and I don't know what it is? Help!

I've bought new pillows, but I don't think it will help because then I feel he will want to put his scent on them and I don't want to keep buying pillows to get ruined before I learn what the problem is. Also he is my baby and I have no children, he is my one and only. I will not do the crate training because he will not make it being away from me that long. He gets nervous a lot and with that he's a big fan of routine. Any advice would be greatly appreciated thanks!

By Ashley