Help please, relationship question. No negative comments please
So I have this friend and he has a sister. His sister is my best friend and I always go to her house and spend the night. But I always end up ditching her to hang out with her brother who is EXACTLY my type and dream guy, we always cuddle stay up late and its just perfect. But I don't wanna hurt him by leading him on, but I like him and he has a gf but dosent like her, what do I do???