MUST-READ - This book is incredibly insightful, it talks about the different types of attachment styles people have. I say its a must-read even if your single as it teaches you so much about yourself and potential partners.
One main thing it highlighted was people giving their partners the age-old 'title' of being called a Phyco. This isn't the case at all but in fact, it's all to do with peoples attachment styles. A needy or clingy partner may not actually be like that at all, but their respective partner is bringing out their anxious attachment style. The remedy? Understanding your partner.
The anxious attachment style needs someone who can be 'consistently available' - yes you hear that right, not continuously available but consistently.
Another attachment style is the avoidant - this is someone who is typically titled a 'player' they don't want to be tied down and in fact have a fear of getting to close to someone. Instead, they will end things before they get started or will act erratically making arguments out of nothing.
Its a brilliant read and has lots of examples and scenarios of different attachment styles in play. It also includes why certain relationships will never work, for example why two Avoidants will never click. It also explains how even if you are a specific attachment style at present, it can change and you can become more secure.