No one stays with you permanently so learn to survive alone.
There are many people who love you and beside you. They are your family, relatives, friends. They are willing to be there to help and share with you.
But none of them will be with you forever. Your parents will grow old and die. Your spouse can also leave you when unfortunately one day you two are no longer love each other.
Your children will not stay with you forever. They will grow up, have a life, have a family of their own. Your friends will not be with you forever. They also have their own world.
Learn to live alone, take care of yourself, love yourself. So when you have a loved one by your side, you’re a happy person. And you will remain happy when you are alone.