Is it normal that ive fallen for my female teacher, im 17 shes 21

So i took a level music and we have 2 music teachers, Miss Williams and Mr Stock. I have had Miss Williams since i started in year 7 and have been attracted to her since year 9. We know shes lesbian and shes not afraid who knows but lately these feelings have been getting stronger and we are getting a lot closer, its not much of an age gap between us shes 21 and im 17 but i cant keep my feelings in much longer, i used to date her cousin who is also female but we finished last year but i still had these strong feelings for Miss Williams. is this normal? What should i do cause were both single and i really like her, do i just go for it?