When Derek found out about you he completely ignored you
Keeping his distance
He figured if he kept his distance that you would be safe
Which didn't work
For one, you helped the pack so you were already in the danger
For two, you're his mate, of course, you would find trouble
For three, your his mate of course trouble would find you
Scott ended up convincing him to talk to you, to give into him having a mate
And Stiles didn't help much
"Yeah how many people will stay with you like she will" - Stiles
Derek is very awkward when talking to you about it
You help him out because you felt bad watching him stumble over his words
Especially since you already knew
Derek being afraid of losing you and trying to make you stay out of the supernatural business
Which doesn't end up working in his favor
At all
Him having to come to terms with that
Derek never winning fights
You both being evenly matched
Peter teasing Derek about having a mate. That it could drag him down
Then he meets you
He would never admit it but he's happy Derek has a mate
Derek feeling happier having you around
He laughs a lot more
Which surprises the pack
Derek surprises you with dates and gifts all the time
Marking each other the mate way
You surprise him by getting the triskelion tattooed on the back of your neck
Showing the tattoo and mate bite mark off proudly
Which when Peter points it out and explains what it is to the pack Derek gets very embarrassed
Being extremely protective of each other
Sometimes to protective
Derek brings up marriage and children every once in a while
You liking the idea
Cuddling with Derek frequently
In his proposal, he asks if you would take his last name