If God did let unbelievers into heaven, it would be hell for them. (How could people who hate prayer and praise to God stand to hang out in a palace of prayer and praise for the rest of eternity?)
Anyone whose name was not found recorded in the Book of Life was thrown into the lake of fire. Revelation 20:15
Lord, don’t let me miss an opportunity to share the love of Christ with my unbelieving friends, so they can enjoy heaven with me and escape hell.