Healthy Relationships are based on love, not attachment. Here's the difference between the two.
Attachment: Insecurity, fear, control, possessiveness, dependence, security blanket, not complete without the other person, heavy emotional dependence.
Love: Freeing, independent, Want not need, no expectations of your happiness depending on the other person, unconditional, no rules/restrictions that are suffocating the other person. Complete and whole in yourself. Healthy Emotional dependence.