Your relationships are a clear indicator of how happy you really are. If you surround yourself with positive people who build you up, help you grow and interact with you on a deeper level then you’ll live a joyful, fulfilling life. If you’ve established a pattern of broken, unhealthy, superficial, unsatisfying relationships it means you have some areas you might want to examine.
When you’re healthy and whole you attract people who feel the same way. Take the time necessary to love yourself and others and that energy will come back to you.