Doing For Me...

I'm not sure if anyone agrees with me, but I have found that I have a hard time doing things for myself that are necessities or that make me happy. Take making dinner for example. I have a hard time motivating myself to make dinner for myself when it was just me in Tampa over the summer, but I'll do it in a heartbeat for April if she's had hard day and needs some time off her feet. The Gym is another example. When I went to the gym, I couldn't go on my own accord, but rather only if I was meeting a friend there--it was the thought of someone meeting me and I didn't want to flake on them that got me out of bed.

Why is this? Anyone out there that know me well enough to address this, tell me why I can't help myself and be contented with that aspect of my life? I mean, I am happy. I am happy with the situation I'm in: I have a beautiful-smart-lovely fiancee, a job that pays my bills, a car that gets me there. I am happy with my life. My question is why can't I be happy doing for myself?

Any ideas?