im not on the lease and my fiaancee is on housing we lived togetether 8 years whatrights do i have she channged the locks

It appears that this is not your fiancee anymore. Check the terms of your lease and if you are the tenant and she is not you will need to file to have her evicted. If possible, work with your landlord to deal with the problem. Moving may be an option if the lease is month to month or about to expire.