Only on CAF!
Yes, to deny your faith is mimicking Judas and constitutes sin. To pray silently is NOT denying your faith.
The OP is unsure of what to do and how to do it. Obviously, he’s concerned with doing the right thing. If he’s asking if he must pray in an area away from others, he has serious reservations about doing so, but still wants to be sure to pray.
So, are those of you insisting that he make an issue of obviously praying in front of others prepared to go to bat for him if praying is prohibited in his school?
@AMcD, many times people pray silently and without crossing themselves in their own homes. Since you’ve been given conflicting information here, please talk to your priest in person or give him a call, perhaps explaining to him more about the circumstances. Best wishes!