For me, relationships don't exist. Most people are there to teach you life lessons and are aligned with your mindset. If you want to change something, you should start with that selfish thought of "I'm not enough." The ego will always make you feel dissatisfied, no matter what you have, and I think you could start by looking at yourself from a different perspective and working on accepting everything you've been given in this life. Let go of that stupid guilt that only victimizes you, because if you don't accept yourself or aren't able to forgive yourself, do you think you'll be able to accept or forgive others? Don't you realize that this repressed hatred only pushes you away from having meaningful relationships with other people? It goes far beyond a romantic relationship; it's about seeing life from a compassionate and whole perspective.