Next month is our five year anniversary. He has always been amazing in bed up until several months ago. Sex used to be so good I didn't even have to orgasm to feel satisfied. Now he just lays on top and that's it. Yes I've told him but he just says that's his favorite position. Well, I said... "it's not mine". He always makes sure I climax but its mostly because I'm fantasizing about other partners.

I'm very open, dirty talk, fellatio, hair pulling, kitchen, bathroom you name it, we kept it spicy. But now my requests are as if he doesn't even care. I'm thinking the mother/lover difference is a blur and he can no longer do those spicy things with me. I'm so depressed about it because I can't help feel its me. We still have sex at least once a week but its just boring. I've even suggested meds to help keep his erection and told him " love I know nothings wrong in that department but I also know a good reason to take meds like Viagra is so men who are married can keep their erection because I may not excite you the way I used too ". I'm starving for a good F###.

He's also several years older than I (I'm 30 he's 37) advice please.

A 37 year old, does not need (or should not need) viagra unless there is a medical problem.
Has he went to a doctor.

But you can just say no, if sex is not a mutual agreement

Sex is always mutual. Not sure what u meant by that.

If it is mutual, why complain, the time to tell them to do different is before you have sex. If you want it a certain way, don't do it the other way all the time.

Forget this being about you and look at other areas of your lives that may have changed or makes stress, like kids, work, or some other problem that needs addressing. So what ELSE is going on? What has changed besides the sex recently? New baby maybe? Do you work? Changed schedules?

"I'm very open, dirty talk, fellatio, hair pulling, kitchen, bathroom you name it, we kept it spicy. But now my requests are as if he doesn't even care. I'm thinking the mother/lover difference is a blur and he can no longer do those spicy things with me. "

Your idea of spicy may not be his. Mybe he doesn't want his hair pulled - ?

Ask him.