The solution to not becoming overly attached or possessive is to focus on strengthening your self-esteem while addressing and releasing fears, including the fear of abandonment, which can cause the need to cling. Working with a skilled relationship therapist or coach can be productive. Also you can practice the three tantric techniques that I described above. These will help you develop autonomy and grounding. Being willing to surrender the tendency to overly attached in favor of healthily bonding will allow you to have more joyous and pleasurable relationships without the pain of obsession.