Northeast would be great options to explore it, if you haven't. I have been Sikkim and it's really beautiful place. You can plan for Sikkim , there are lot more places to explore and definitely you will fall in love with the simplicity of the place
It depend on your taste of travel you can go to Himachal - Manali,Kasol, Khajjiar,Chamba
you can go to uttrakhand - Auli , Har ki doon trek, Mussoorie, Nainital
and if you want to travel in South Munnar, Kodaikanal,allappey these are some good options
Aap bihar aa jao gautam buddha , Guru Govind Singh ji birth place and nalanda khandar Rajgir nature Safari or any other historical place hai ghumne ke liye budget trip me