Iv taken lessons for over a yr now and iv learned some theory. My question is do I really need to learn all the scales or should I just learn to play the songs I want to play..which happens to be the reason that I want to play bass in the first place
I'd encourage you to just learn the songs then. Theory will come in stages, you don't just "learn" theory as if it's a sandwich you can eat or a level you can complete. Theory is just a system we use to describe and communicate ideas about music. You need to learn enough theory so that you can play the songs you want to play.
Who's to say how much theory you need to learn? We pursue music because we love it, we shouldn't arbitrarily place academic constraints on ourselves. If and when you encounter something that fascinates you and you want to figure it out, learning theory will be no problem. Right now I'm sure it feels somewhat like pulling teeth which means you're not seeing the value of it and you're not going to get as much out of it.
For all of the grammatical analogies above, the OP stated that he wanted to play songs, he didn't say that he wanted to become a music teacher. Just because you can comprehend that last sentence does not necessarily mean you can point out the antecedent, anaphor and coreference in that sentence. If you can point out those grammatical labels, does that necessarily mean you understand that sentence better than someone who cannot?
I have studied theory and will continue to do so because I'm fascinated by what I encounter, I do not however have any illusions about my knowledge of theory being any more important than, say my ear, or my tone, or my rhythm. It's just one piece of the puzzle, it's not everything.