I understand your feelings, Akayj. It's very healthy to have that attitude. Do things that make you happy until you get your BFP (then, continue to do things that make you happy).
I never have gotten very sad with AF either. I tend to get sad at other times in the month though. Every now and then it will just hit me randomly. I'll think about how long it has taken, and I'll wonder how long it will take until we're successful. I'm almost 32, so I am feeling some pressure, I must admit. Instead of worrying about it though, I have, like you, been working out most days of the week. I have decided to get myself in the best shape of my life while I wait. My best friend has two daughters under the age of 2, and she is jealous of the time I have to do things for myself (like go to the gym). It's all a matter of perspective.
Having a baby is going to be life-changing and very difficult at times. It is wonderful if you are able to embrace life for what it is at the moment.