Do I need a comma in this situation

[Patrick S.]

Example: Oh yea, I like her.

Would I need a comma after oh (oh, yea, I like her)?

 

[emsr2d2]

Example: Oh yea, I like her.

Would I need a comma after oh (oh, yea, I like her)?

No. "Oh yes" or "Oh yeah" is a recognised statement in its own right, I would say.

The only thing I would say is that you should use either "yes" or "yeah". "Yea" is a very archaic English word for yes, now only really used in voting (people vote "yea" or "nay").