I somewhere heard that same gothras cannot get married. I have a friend who belongs to the gothras Srivatsa loved a boy of gothra Bhargavasa. Is there any possibility that both gothras are same but have different names?
There cannot be two different names of a same gotra. However, different gotras may have similar pravaras.
example : Vishvamitra and Kaushika gotras.
So pravara may not be confused with gotra. Pravara is name of some famous rishis of that gotra.
A rishi has an option of starting his own gotra with his name for his progeny.
Gotras like Jamadagni , Srivatsa, Vatula do share some of the same rishis in their pravara.
Yes very much. Your friend and the boy both are Brahmins belonging to the BHARGAV lineage (descended from Bhrigu rishi). The Srivatsa, Vatsasya, Bhargava, Chyaavana, Aapnavaana, Aurva, Jaamadagney are all from the same family that originates from BHRIGU Rishi.