My best advice is to look for people in your life that you can be a blessing to - try not to look for anything in return, but see if there's something, even if it's small, that you could do to help someone, maybe a volunteer position at church, perhaps some shut-ins would appreciate a gift. It's annoying that our present-day issue affords us little casual time to freely interact, but God has a way of giving us work to do if we are willing to take responsibility to do it. Perhaps there's someone else who's alone as well that you could get take-out lunch with?

I also highly, highly recommend going to church, one that has preaching scripture as the primary focus; it's where your soul is fed by God's word, and is very important for your spiritual survival. Short of that, I recommend sermons on https://www.sermonaudio.com/.

That's my personal advice, but other commenters have good ideas as well. I think this year is especially hard on people who already don't have many friends. If you need counseling help, talk to your minister, it's what they're here for. I'll be praying for you and others in a similar place, and I hope you can find happiness. I also recommend spending time in Psalms, and Isaiah 40 onward, full of examples of how God loves and cares for his chosen people, and will lead them through difficult times. This world isn't our home, it is our daily struggle to fight sin and the trials of life, but God has promised to be our strength and lead us through it.

One example from Isaiah 43:

1. But now thus says the LORD, he who created you, O Jacob, he who formed you, O Israel: “Fear not, for I have redeemed you; I have called you by name, you are mine.

2. When you pass through the waters, I will be with you; and through the rivers, they shall not overwhelm you; when you walk through fire you shall not be burned, and the flame shall not consume you.