1) you have been married for only 4 months .
2) you cannot file for divorce unless period of 1 year has elapsed from date of marriage
except in exceptional circumstances
3) has your marriage been consummated?
4) if so then you are not impotent . record her abuses
5) you have not mentioned the house wherein you are staying belongs to you or not
6)if it is owned by you then your wife has right to stay in her matrimonial home
7) consult a marriage counsellor and try to save your marriage