Don't even know where to begin

I've been off work for almost two months now with a hip injury that makes it nearly impossible for me to sit for any real stretch of time without pain.  Having an office job, this makes working pretty darned difficult right now.  As a result, my partner has really taken up the slack around the house.

He gets our son ready for bed every night.
He gets the boy in and out of the car, to and from daycare.
When the kid wakes up in the middle of the night, my guy jumps out of bed to comfort him.
He's making dinner every night, and if he's just too bushed to consider dinner, he's picking up the tab for takeout.
He bought me a bed tray so that I can comfortably eat in bed.
He's washing my laundry.
He's comforting me when I get so stressed out and frustrated at my inability to do much.
He stops whatever he's in the middle of doing, just to see if I need anything. 
He'll take the kid out for the day, all day - on his days off - just so I can have some quiet time, and so the kid doesn't feel cooped in.

He's doing all this - and so much more - so that I can recover that much quicker and because he loves me.  He is truly what a partner should be.  Father's Day is coming up and while I already have a gift for him lined up, whatever I get him won't even come close to making up for all that he's done for me and our son.  There isn't any way I can truly put to words the love and gratitude I have for him.  He's done so much for us, not just these past several weeks, but for years.  How do you thank someone for their constant, unwavering support and affection?  Something tells me that a tie simply won't do. 

To my partner, today I say: Thank you for being the amazing man that you are.  You are my rock.  I would be absolutely and wholly lost without you.  Not just because I'm laid up, but because you give me a reason to want to get up.

To his mother, today I say: Thank you for having him.  You should be so proud of your son.  It wasn't easy, with the cards you were dealt but you did a terrific job!

To our son, today I say: Thank you for giving me a piece of your father, for all days.  When you grow up, and want to know what it means to be a man, just look at your father.  He is kind, supportive, intelligent, self-assured, respectful and strong*.  He is dedicated to the people and things that matter to him, and when he says he's going to do something, you know it will get done.  You are very lucky to have him as your daddy!  No one will do more for you than him.

Writer's Note: I'm talking emotionally, as I don't believe being physically strong defines a man... though he is