I did have to spend the first 6 weeks feeding the baby pretty much nonstop. I think for most people it's more like 4, but my DS is a bit of a keen feeder. Something clicked, though, and by 8 weeks he was spacing his feeds out, and now (13 wks) he feeds maybe every 3 to 4 hours for 20 minutes.
I had some "argh I just want some time to myself!" moments, but because he's my first baby I don't know if they were breastfeeding related, or just me being in total shock about having a baby and not being able to be by myself any more (at least, not without having got someone else to hold the baby!). I think the phrase is 'babyshock'!
Now BFing is easy, and rather snuggly and nice. I love knowing that wherever we go, I can feed him/comfort him/get him to sleep. I will second (third? fourth?) the bit about night feeds - although you have to do it all, you don't have to get out of bed (or far out of bed) to do it - and that's a joy. Once I learned how to feed lying down there was no looking back!
Also, I introduced the odd bottle of expressed breast milk when DS was 4 weeks old (because I was going to have to go back to work part time at 6 weeks) and so that means that when I'm totally knackered, I can give DH a bottle and he'll do half the night feeds, while I get some solid kip in the other room - then we switch and he gets the other half of the night in the spare bed and I breastfeed DS if he wakes. That's been extra handy recently as DS has had a cold and been coughing to wake himself up, poor mite.
Sorry, rambly - but don't let 'oooh you don't want to breastfeed, you'll have to do it all yourself!' put you off. You don't have to do it all yourself after the first month and a half.
I got lots and lots of help and advice from here, I also got lots of phone numbers and groups etc ready beforehand, that helped me a lot. I think it's handy to know about things like evening clusterfeeds (when the baby wants to feed and feed for 3ish hours every night) - because if I hadn't had DH ready to walk the dog and make dinner every night for a month, it would have been harder on us all. A supportive partner is a real godsend.
Frankly, one of the nicest things ever said to me about breastfeeding was 'every breastfeed counts. Every breastfeed is great for your baby.' So yeah - even if you're not sure if you'll do more than 2 weeks (or whatever) - it's a lovely thing to have done for your little one.
:)