You and Sollux are like, matesprites, or almost.

After Vriska made him kill you by controlling his mind, you and him never had a grudge against each other, since you know he was controlled by Vriska, and he hates her a lot for that.

After a long boring mission, you're back with Sollux. He's carrying you in a bridal style while holding your hand as well, you two just walk through as you seem comfortable around each other.

Sollux stays silent, with his normal blank face, carrying you in a bridal style.

You eventually find Tavros, who was talking with Terezi, they both look at you two and wave, smiling

"Hey!" - Tavros smiles

"Long time no see!" - Terezi grins.

Sollux just walks towards them, still carrying you bridal style.