It's emotionally tolling constantly wishing the person was with you. It's not just the lack of physical intimacy, it's the simple things like going out together or one of u making dinner etc. idk that's the kinda thing i keep in contact with the person but don't try to take it farther than that. It just kinda makes both of u miss out on irl opportunities. I have met couples it worked out for though but i can count those couples on one hand