The question is how to show your love to your husband when both of you have hectic schedules. How can you cook when you are busily engaged?.. if the "busy" is not connected to cooking? Other ways, if any?
Just one text messaging is enough for a day: "Take care... I'm always with you.. you are always in my heart..." No need to repeat your enquiries through phone calls, mails and messages. It is enough if you keep off and avoid disturbing his hectic schedules. That may be irritating to him.
Slip little notes places. Take pictures throughout your day and send them. Plan an "us" night every one in a while. It can really be hard sometimes. Every Saturday night are our date nights. It's nice to get dressed up and just be with each other when you've had a crazy week.
If you live in a cold area with snow, when the snow has piled up on their car, wake up early and start the car, warm it up and clean it off for him. If he parks in public parking area, leave a flower and a note on the front seat of his car, so when he gets off of work, he has a surprise. If you know what he's going to wear the next day, write a nice loving letter or note, place it in his wallet pocket, or wallet, or briefcase, when he opens it, it will be unexpected and appreciated.