I would suggest going for a coffee with her respectfully and talk with your heart like 'I don't know if you noticed, but i have a crush on you from the time i saw you. I know you are my team leader, i have tried a lot to sustain myself but i am getting depressed day by day. I know things won't be the same moving forward. Let me know what you think of me. '
Additionally, try to talk about things which they like the most. Every lady likes when you attract their beauty. Make sure you choose your words wisely.
Do not overthink, she will not do anything against you even if things went bad.
Leave me a message if things works out!