Emotionally dependant?

For the past 7 or 8 months I've been developing a relationship with a friend and we've become really close, every time I see her it's like a fog is lifted from my mind and I'm happy but once I come back to my house the fog comes back and I feel so down. I just can't help the feeling that maybe I'm becoming emotionally dependant to her, I've also thought that maybe I just love her but she is lesbian and I can't tell her I like her it would just be weird and I don't want that for us.