Different religions in relationship

My boyfriend grew up Reformed Baptist and I grew up WELS and attended Luther Preparatory School and graduated from there, but did not continue on to MLC, because I feel I can serve God in a different way. My question is what are the major differences between Reformed Baptist and WELS? There are big ones that he and I have discussed, but a more defined answer would be very beneficial.

Reformed Baptist churches in the United States, regardless of which association they belong to, usually subscribe to the London Baptist Confession of 1644 or 1689.  Reformed Baptist doctrines that differ from your faith include, among others:

Double predestination—the false teaching that in eternity God chose some people to be saved and others to be damned.  Scripture teaches that there is an election to salvation only (Ephesians 1:3-6; 1 Timothy 2:4).

Limited atonement—the false teaching that Jesus died only for those who believe in him.  Scripture teaches that Jesus came into the world to live and die for all people (John 1:29; 1 John 2:2).

Irresistible grace—the false teaching that the Holy Spirit cannot be resisted when he comes to convert people.  Scripture teaches that grace is resistible (Matthew 23:37; Acts 7:51).

Perseverance of the saints—the false teaching that believers can never fall from faith.  Scripture teaches that Christians can abandon the faith (Luke 8:13; 1 Timothy 1:19).

In addition, Reformed Baptist churches teach that baptism and the Lord’s Supper are “ordinances,” acts that they carry out because of the Lord’s command to do so.  Lutherans call baptism and the Lord’s Supper “sacraments” because the emphasis is on the Lord graciously working through those acts to instill faith or nurture faith.  Reformed Baptist churches maintain that only adults are to be baptized and that baptism is to be done by immersion.  Lutherans recognize that baptism is intended for all, even children, and that Scripture does not specify how water is to be applied (Matthew 18:6; 28:19; Mark 10:14; Acts 3:38-39).

It is good that you and your boyfriend are discussing matters of faith.  Have more discussions on these subjects.   If you haven’t done so already, invite your boyfriend to come to church and Bible class with you.  Finally, you can ask your pastor to address specific questions you and your boyfriend might have.  God blessings to you.