Is it considered nifaq (hypocrisy) if I repent then commit the sin then repent again , although each time I repent I dont want to repeat it but I am in process of leaving it?
If you really repent and decide not to do it again, then you feel weak and commit the sin again, it does not mean Nifaaq (hypocrisy).
You need to strengthen your will power and your remembering and fearing Good, to be able to avoid the sin.
Wassalam.