I too am a relationship hopper. Throughout my 20s (I'm 28 now) I've been single for maybe 8 months tops. I always NEEDED someone or some kind of distraction. It sounds like your comfortable being alone and that's a good thing. If you feel your starting to get that relationship itch then put yourself out there if you're ready. Maybe some online dating or something. If you're not ready and you're feeling lonely, maybe some therapy will help you cope. Or spend more time with platonic friends.

Dx: BP2, PTSD, bulimia/anorexia
Seroquel 300mgs
Trileptal 300mgs
Buspar 45mgs
Ativan 1mg PRN
Vyvance 70mgs PRN