It's relatively common, from what I have been reading.
Now if they fight and break up, sure, Will's going to have a headache, but his bond with Tommy is very strong.
Scene morning after the break up, kitchen table.
"Pass the pancakes to your Ex boyfriend please..."
"No, he smells funny and he's a jerk."
"You're the one who broke up with me! Now here's the syrup, jackass..."
"You two quite done, or do I have to seperate you again?"
BOTH: HE STARTED IT!
So nope, no different from normal then.