>>46521913All gardes are different. Levels of trust will vary even if you give the same care and attention for different ones. I would also say taking dex entry in a sense that they would suck you off just because they'd die for you is ridiculous.
Your relationship will only go as far as she wants, but in reality we all want to love the elf lady knight; so why not just think that your gardevoir is attracted to (you)?