Everyone may have this common fear at different levels as we get attached to people we love, real quickly and enjoy their company and it feels like life would be different without them and so we fear that our loved one is going to physically leave and not come back or will abandon our emotional needs. We worry about getting rejected by peers, partners, companies or entire social circles.

To understand this fear one needs to know why it happens - our behavior and actions in current relationships are all thought to be the result of old fears and challenges faced in past relation. We all have emotional needs , when those aren't met, we may feel unappreciated , unloved and disconnected , we can feel very much alone when we are in a relationship with someone who's physically present. You may be afraid to let yourself be vulnerable in a relationship , you may have trust issues and worry excessively about your relationship, in time your anxieties can cause the other person to pull back.

 An healthy fear of losing loved one is more like a rising anxiety , and comes with extreme thinking .you may get symptoms like getting overly sensitive to criticism , difficulty in commitment in relationship , working too hard to please the other person, staying in a relationship even if its not healthy for you, can lead to wall yourself off to avoid getting hurt.

The first step in overcoming your fear is to acknowledge why you feel this way .Personally i think the first question that you need to ask yourself is do you feel valued by this person?, do they genuinely make you feel whole? or do they leave you feeling like you are missing a piece of their life that affects your own, you need to think upon this . You may be able to address your fears on your own or with therapy.  Try to accept whatever situation is , if its not worth get over it .

Everyone of us has fears about being left alone. Most of us struggle with some fundamental feeling that we are unlovable or won't be accepted for who we are. But we should overcome all these fears by self compassion. It takes courage for someone to be willing to see what hurt them and face the primal feeling of abandonment they may have in past . Just try to focus on three elements : self-kindness , mindfulness( helpful), common humanity.

‘’ It isn't fear of abandonment that sabotages our relationships ; it's how we handle it.