Lonliness is such a hard feeling. Learning to be satisfies and comfortable with ourselves is equally challenging. May be self acceptance and peach within will help you. something you can proactively work on in therapy.

Sometimes interests can generate new friendships with common interests. Maybe you want to conisder something like that.

DBT can also be an option. it gives you strategies to use for dealing with emotions and distress.

Just some thougths.

BB