Chords though, that's where the fun is!!!!!
+ A Million... once you figure out chord tones, you're golden.
However, if you're not feelin' it, there's nothing wrong with putting the ol' girl down for a while. If overall music is what you're into, then why not grab another instrument and learn that. It will make your bass playing better.
Or better yet, imagine you *are* playing another instrument when you're playing bass. For me, I broke a huge plateau in my playing by imagining my lower register as a baritone sax, and my higher register (above the 12th fret) as a trumpet, and I still use it all the time...
edit: "is it difficult to sight read?"
From my opinon, yes and no. If you know the basics of "do-re-me-fa-so-la-ti-do" and can apply it, then you're good, but IMO, the best way is to throw youself into it in a band situation, and once you know sharps, flats and the names of the notes in both bass and treble clef (as well as the names of the notes on your bass) it's not too hard. Just use the internet and you'll be fine. There's a wealth of information out there, but admittedly, the TalkBass forums can't steer you too off course, and also if you want more info, check Carol Kaye's website. That woman is should be declared a Saint.
TL : DR -- Yes, you should keep playing. Take a break or work through it, but either way, keep playing. It will get better, and you'll always be able to play with people and make great music.