About your fear of talking to your pastor, please be aware that most conservative Christian denominations advocate to love and minister to believers struggling with sexual orientation and gender identity issues. LCMS is no different. In their most recent (2019) convention, they pass Resolution 11-03A by 96.8 percent: "To Encourage Synod to Develop Resources to Aid Congregations and Schools regarding Sexual Orientation and Gender Identity Issues". The main points are in that article and you can read the complete text (PDF) in the 2019 Convention Proceedings (page 215-216). Therefore, you shouldn't feel left out and if your pastor is faithful to LCMS convention proceeding s/he is duty bound to help you and maintain secrecy:
Resolved, That pastors and congregations of the Synod be encouraged to minister compassionately to those who experience sexual orientation and gender identity issues through prayer, the proclamation of Law and Gospel, the Sacrament of Holy Baptism, corporate and individual confession and absolution, the proper administration of the Lord’s Supper, the mutual conversation and consolation of the brothers and sisters, and pastoral care;
The Bible doesn't condemn homosexual tendency, but homosexual behavior. About Romans 1:24, you'll need to read the passage context (Romans 1:18-25) referring to people who ACTED against their conscience over a long period of time, refusing to heed God's calls of repentance. From your description, it doesn't seem applicable to you, who struggle with your condition without acting on it. In fact, one of the resolution points includes a quotation of Romans 8:1:
WHEREAS, "There is therefore now no condemnation for those who are in Christ Jesus" (Rom 8:1)
and a resolution to condemn abuse against them:
Resolved, That we regard all those who experience sexual orientation and gender identity issues as our neighbors, beloved of God, and therefore condemn acts of abuse committed against them;
PLEASE NOTE that Christianity SE (including this answer) cannot replace your pastor or other trusted friends / professionals who know you personally. But I hope the above is the kind of resource you are requesting.