Well, there are night courses too (but DAMN are they hard to stay motivated for - tired after a hard day of work, now hours of classes, yay! Plus homework to kill your weekends, good times)
OK one thing: I think at a lot of schools (definitely at mine), 1st year courses are deliberately sucky - they called 'em "bust out courses", designed to winnow out the influx of unmotivated undecided students. For us it was huge lecture halls, little interaction, impersonal assignments, etc. If I wasn't already loving the subject beforehand, I might have been put off by it :p 2nd year was a big step up, and 3rd and 4th year were actually pretty damn good - a lot of the really interesting classes had maybe 6 people in 'em, and lots of interaction with a prof who actually knew a lot about an interesting subject - yay! Ask your advisor or upper level students about this, most will tell you frankly if it gets better or if it will just be more of the same - even ask if you can sit in for a day or 2, you may see you actually have something to look forward to.
Another thing that helped me, and I highly recommend it especially if you're spending your own money - look for all the ways you can test out of courses. *Most* places in the US accept the CLEP tests (by the same guys who make the SATs - go look em up). Pay $50, spend an afternoon taking a multiple choice or (rarely) essay question test, and BAM college credit for a whole course. Doesn't that beat the hell out of paying umpty-thousands, sitting through 15 weeks of lectures and homework? Especially if you had a decent high school program, or read a lot on your own, the low level humanities classes tend to be almost entirely a rehash. (They're the "bust out" courses for the humanities majors). Many unis have their own ways to test out of courses, they don't publicize it and kind of discourage it ('cause you're cheating them out of what they see as their right to your tuition dollars). Or at worst, see if you can take them at a local community college and have the credits transfer, I did that for a few courses and it was MASSIVELY cheaper than the Uni prices.
3rd point - if after all that you still don't think you can stand it, reassess why you're in school to begin with. Mainly it's to provide a structured learning environment, and to make sure you cover the foundations and basic framework you'll need as a professional. (And to provide a "well rounded" education - my school was definitely hit and miss on that, heh, at least for anybody who had had a half decent high school program). If you're decently motivated you can really do that on your own - make a list of the same key things that get covered - for us it was algorithms, data structures, architecture and assembly language, then software engineering, analysis and design, a bit of databases and networking, and after that it would be 3rd/4th year concentration on your focus areas. And then make your own plan to make sure you cover it all thoroughly - MIT online courses, chug your way through texts on your own, whatever. Be warned, it's easy to say you'll do it and WAY WAY harder to actually do - that's the main benefit of the uni imho, it's a structure to force lazy adolescents into getting the habits and techniques of studying, completing assignments, working to deadlines, etc.
Especially in CS, after a few years of experience most employers don't care that much whether you had a formal degree or not. Just watch out - there are still plenty that have an inflexible Human Resources department that lists a degree as a requirement and will filter out your resume even before someone intelligent has a chance to see it, so there's still an advantage to a degree. Is it 4 years plus umpty-thousands of dollars worth? Well, good question. Choose carefully YOUR ENTIRE LIFE IS AT STAKE heh