Your boyfriend could be clingy for many reasons, some of which may have nothing to do with you completely. Clinginess is a personal trait that could be developed by childhood trauma or any trauma during the cause of your life. It’s usually borne out of the fear that a partner would leave the other or lack of what to do on the part of the Clingy partner.  Not all women are open to clingy men, but men don’t seem to mind clinginess much. It’s an entire paranoia that things may not work out fine and that stirs up pressure. It’s better to speak to your partner about his problem.