you are not perfect; so "possibly" you can't be perfectly sure.
However . . . we need to grow more so we can do things with God without getting confused and impatient and afraid (1 John 4:18).
Grow to get better with God, for a while, and grow so you are better in loving any and all people like Jesus wants > Matthew 5:46.
And if you are growing in God's love with each other, you will see how your relating improves, then see how God satisfies and guides you in His peace. As you grow in God's love, God will give your personality a major makeover about things that you want; so be open.
"For God is not the author of confusion but of peace, as in all the churches of the saints." (1 Corinthians 14:33)
"But God has called us to peace." (in 1 Corinthians 7:15)
Yes, Amber, it is possible for emotions to break a relationship. So, we need to deal with this, "with all lowliness and gentleness, with longsuffering, bearing with one another in love," (Ephesians 4:2)
To me, personally, "all lowliness and gentleness" includes emotional
gentleness and humble emotions, not driving and won't-take-no-for-an-answer passions and possessive reacting and angry blowups. Jesus says about how He is in His love, "I am gentle and lowly in heart, and you will find rest for your souls." (in Matthew 11:29)
So - - - by getting into Jesus Christ's way of loving . . . right now, whether you marry him or not
, you two can get into the very best of what is in God's kind of marriage, by getting more into His love's "all lowliness and gentleness, with longsuffering"
"rather let it be the hidden person of the heart, with the incorruptible beauty of a gentle and quiet spirit, which is very precious in the sight of God." (1 Peter 3:4)
But in case someone does not belong with someone else, and God does know this . . . it is good to be putting God first so we deal with this calmly and being pleased to be honest with God. If we don't belong with someone, He is not going to make us deeply emotionally sound for what He does not want. His love will make you better and better so you are doing everything "without complaining and disputing" (in Philippians 2:14). So, trust God, test honestly with peace, and enjoy finding out how good His will for you is.