I too grew up in a strict Christian household and had trouble accepting my sexuality when I was younger. It will come a point in your life where you are going to have to start living for yourself if you truly want to be happy. First evaluate your identity as your own person. Do you actually believe in the Christian religion or are you just following behind your parents beliefs? Come to terms with their being nothing wrong with you. Contrary to popular belief many people slide the scale from extremely hetero, bisexual, to extremely homo. More people are in the middle and pick a side they feel comfortable in or goes with the majority. You aren't a anomaly.
Your attraction to your therapist could be because you are telling them your thoughts and feelings. This emotional connection you have with your therapist is one sided and strictly professional so I would not advise you to think to deeply of that.