If your faith is a strong part of your life and you would like to meet people who share your beliefs then look in here. Christianity, Islam, Judaism, Paganism, etc. are represented. Dating sites for people of a particular faith are growing in number and size as members of each flock join together on-line. For true believers their faith is central to their lives and requires a companion who is similarly devoted.
However, if you believe (as Dion Fortune reminded us) that all gods are one God and all goddesses and one Goddess, and that there is one Initiator, then you could fall in love with anyone from any religion not just your own, and your love would still be sanctified and blessed.