Even in the churches we find people who are very envious. Or you may remind this person of someone they had disliked in their life, or something about you they envy very much. These are very insecure people who need to have a life of their own. Just continue to attend church, and with God's help continue to ignore the way they are with you. We will pray that God change this person's attitude toward you.
Lord you can see this situation going on in this church with that individual. I pray the holy spirit will convict them, so they will stop with this envy. Give them a more acceptable heart toward this person and whoever attends that church. Give the person asking for prayers concerning this situation the strength and peace they need to continue serving you and praising your holy name. For we go to church to worship you, not to be upset by others. Have your perfect will be done in this situation, and in their life. I pray this in Jesus name amen.