Unbelief is the lack of belief, especially concerning God's Word. Disbelief is a posative refusal to believe because of being convinced its false.
Most unbelivers have no basis for what they believe but want everyone who believes to change so they look right, therby they cause diagreement at all costs to make themselves seem smart.
The Bible warns against strong associations with those who profess unbelief. Especially in marriage.
Please Read these Scriptures and Meditate on what God is saying to you.
Dear Heavenly Father I come to you and ask you to increase my faith and my desire to believe what I cant see. I pray for the full gift of faith and the indewelling of Your Holy Spirit. Thank you Lord for revealing to me how to have a mustard seed of Faith to move even mountains.