Haha, I remember feeling like that. After an intense boss battle you've completed the main quest and it's sorta like, 'now what?'
My character finally confessed his affection to Mjoll and the two get married. She is able to cool the raging beast inside him and the two make an excellent pair. Without her he would be consumed by his inner darkness, this naturally makes him rather protective of her.
I completed side quests, took on bounties, discovered all the words of power (that weren't tied to a specific faction, which means there are some I will never get due to role play and not wanting to join the college, or companions because it dousnt fit with the character.)
I've dicovered great wealth, my gear is maxed out, so are my skills. It's time my character settles down but then... There's is talk of a 'dawnguard' faction, and strange cultists are looking for the Dragonborn...