We're complicated animals; it's rarely as simple as "I'm an introvert, I hate other people" or "I'm an extrovert, I hate being alone.
These pleasurable effects reinforce and motivate us to repeat behaviors that stimulated the release of dopamine.
Being married to an introvert if you are an introvert and vice versa can be extremely hard work, but communication and compromise are the key to making these precarious relationships work.
Snuggling up in front of a classic movie? It is as if we are afraid of the sun, and afraid of the sun setting.