Am I bisexual

Two years ago, I met my daughter's teacher and liked her a lot. We would get together after school and talk about eating right and how to live a healthy lifestyle. Miss Wilson really helped me so much and I was drinking green smoothies, cooking healthy foods, eating the right portions and as a result, I lost 7 lbs in one month and lost total 15 lbs in 4 months. Whenever I would get to a stumbling block, I'd ask Miss Wilson what to do.

At the end of the school year I still wanted to keep in touch but she emailed me and told me she was "unable to answer anymore of my questions". It really hurt me. I mean I had went to the doctor and being a diabetic, my A1C was down to 5.7 and I was losing weight. I talked to her about being friends and she said it wasn't possible since she was my daughter's teacher. I thought I'd be ok but I wasn't. I emailed her and told her she reminded me of my sister who had just passed away 2 years before. She made me feel alive and I loved being around her but she didn't know this. After school was out I started missing her like crazy and soon I realized I was very attracted to her. I started looking up things on the internet like how to know if you are a lesbian. I found the show that came on showtime called "The l Word" and fell in love. I watched the show over and over and knew that I was in love with Miss Wilson. Every chance I got I would put myself in a position where I could see her.

I approached "Beth" (by now she was Beth to me) several times asking her what she did on weekends or if she'd like to go out to eat but she just pushed me away and some times ignored me. I felt so hurt. Like I said, its been 2 years and I still feel like I'm in love with her. During these 2 years, I have dated a guy and broke up with him and now I am actively having sex with another man I met. I have never had sex with a woman but I really want Beth. I can't get my mind off her. I am 48 years old and struggling with depression and anxiety and now whether or not I am bisexual. I have told my best friend about my feelings but other than her no one knows. I feel like I am going crazy. What am I suppose to do?????