Do i have vitiligo or its fungal infection in penis?

i have white patches on my pines its about 2 month its increasing and getting bigger

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and no other in my body i recently changed my sex partner if its wet the whiteness getting less

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some one told me its vitiligo but i am not sure please help me

Yes, it could be something like vitiligo - however this could be a skin condition developing.
It would be best to get this checked out by a Dermatologist.
Find the largest sexual health provider in the area in which you live and at least phone them and ask if you can get this checked out
If you happen to live in the UK there are also GUM Clinics