Perhaps you should read up on the French Defense Advance Variation. I don't think it's considered white's strongest line, and it must be so for a reason. Do you have access to the free online DB (Games Explorer) they have here? If so I recommend it. (You probably do because I see that you have a platinum queen describing your membership level.)
If not, choose some random online DB.
Go in that variation, explore it. Play through whatever the most common line is. Find some games where white wins, some where black wins, some draws. Find some games with a famous player for white (high-rated famous player, like Anand, Kasparov, Karpov, Shirov, Polgar). Find some with a famous player for black (Korchnoi). This is a good way to learn a subvariation of any opening at all.
Sometimes when i play french defense i wind up in a cramped position...
So what can i do to relieve the pressure/do another variation?