Feeling lonely

Tonight my partner is out and I’m home alone. I normally love and cherish time alone and love my own company above being with anyone else. But tonight I’m feeling really sad and lonely, which is unusual. I’m not sure if I should sit in the sadness and recognize that it’s trying to tell me that I need to cultivate more deep relationships, or manage my mind to not feel lonely.

When is it clean and beneficial to feel an emotion and when should I try to manage my thoughts around it?

I’m a bit of a loner and don’t have any deep relationships with girlfriends. I have family and my partner, and a few friends I see now and then for coffee or dinner, and that’s normally enough for me. But I realize I don’t have anyone on my wavelength that I have a deep unconditional relationship with.

Thank you so much.