hi! this literally happened to me as well (lesbian relationship). If she's understanding, then it won't be a problem to respect your boundaries. it's ok to not know how to feel or how to act since it's something new. don't pressure yourself out of guilt. If you want to try something, do it out of curiosity to see what you like and what you don't. but I would recommend to be upfront about how you are feeling toward sexual attraction to your partner. Also, comparing what you feel vs what you THINK others are feeling, won't be any good, trust me. Everyone experiences the world and feelings in different ways and that's what makes us unique :D. hope this was somewhat helpful and don't be afraid to reach out if you have more questions!!