Just wanted to say that I came out to mum few days ago and I was so nervous but she just said “I figured” and “I was in love with my female PE teacher for like, 4 years ‘

Feelings of attraction towards people of your own gender is pretty common (that doesn’t mean people are bi all of the time though!)
I’m glad that you could come out, and it seems it went well! :3
With love,
               Bi-Positive.