It feels easy, like you already know how to be around each other. The risk is you stop choosing it.
The two of you
Scorpio. You feel real when it is honest, even if it is heavy. People see the intensity. They trust you with the thing they will not say elsewhere.
Pisces. You feel real when you do not have to harden yet. People see the softness, and someone who understands before the explanation.
What wears it out
Small talk that asks you to be fine drains you. So does a secret kept from you.
A demand to be definite before you are ready drains you. So does a hard room with nowhere to retreat.
Scorpio feels it first and explains later and does not like to be moved once settled. Pisces feels it first and explains later and adapts quickly, and may not finish.
Wanting each other is not the hard part. Staying awake to each other is. Comfort can turn into taking the warmth for granted. Together, it shows up as romance, play, and being admired. The other way around, it shows up as the bigger plan, farther away.
This is the answer people want before anyone knows a birth time. Two real people have more than a sun sign. If it matters, cast both charts.