Because we are afraid that we will not be loved. That in the present or in the end we will not deserve someone's affection.
So let's a few things straight.
Deuteronomy 31:6 Be strong and courageous. Do not fear or be in dread of them, for it is the Lord your God who goes with you. He will not leave you or forsake you.”
Why will God never leave you?
Ok so God loves me all the time. But what about people?
John 13:34-35 34 A new commandment I give to you, that you love one another: just as I have loved you, you also are to love one another. 35 By this all people will know that you are my disciples, if you have love for one another.”
Now I can go on and on about this. But let's cut to the chase. If you don't want to be lonely.
Love God. He will always show His love to you. You don't have to pre-qualify to receive it. All you have to do is ask.
Love someone. Show your love to someone else. Show kindness and generosity. Don't make people deserve your love. Just give it away.
Be loved. Let someone show their love to you. Most likely someone who said, "I love you" hurt you in the past. Because of that, you have a problem trusting others. I get it. But still. You can't be lonely.
In a world that twists and turns love into anything but what it is supposed to be, it's easy to see why people fear loneliness. But God will never fail to love you. Let Him.
PRAY: Dear Jesus, love me. AMEN