Closeness does not require the same social rhythm
A friendship can be real even if one person wants more movement, more people, and more activity while the other feels best with calmer plans.
Each style is protecting a different fear
The more social person may fear the bond growing cold. The quieter person may fear getting worn down by too much stimulation and not enough breathing room.
Long-term friendship needs a halfway rhythm
The healthiest rhythm is often one where lighter options exist, clearer communication exists, and neither person has to abandon their natural pace to stay close.