Relaxation is really important but not when it's something you look forward to doing. It's also not good when you let yourself go completely crazy with food/alcohol jusylt because you feel like you've earned it during the week. 2 really bad days will throw off your progress from the week. You should instead work to integrate relaxation in reasonable amounts into your week so that you don't feel like you're torturing yourself and can't wait for the weekend. You should get to relax every day. That way you don't want to quit and you won't overindulge over the weekend.