Hi, these are some of best destination to travel in North India -
Mussorie
Auli
Landsowne
Kasol
Mcleodganj
Triund
Shimla
Manali
Spiti valley Hope it helps you and do share your experience on Tripoto.
North India in February. you have chosen perfect time for Rajasthan, Gujarat, some places in Himachal and Uttarakhand will be off limit due to snowfall but, otherwise it is good time to visit lower belts of Himalayas too.