Hi Taniya, I think February is too cold for thr north. However, if you are flexible , you can visit Kasar Devi in Almora. It's like Kasol but spiritual. You can stay at a backpacker hostel there called HOTS.
In Uttarakhand you can go to following places:
11. Mussoorie and Landour
13. Kausani In Himachal you can go to following places: 1. Mcleodganj and Triund
3. Shimla, Chail, Kufri and Narkanda
4. Kasol, Tosh and Kheerganga
5. Bir Billing and Barot Valley