My DD is nearly 13 weeks and I feel like we're coming out the other side of a tough old time!
I know when she was about 2.5 weeks I just cried and cried because bfing was so hard but at the same time I didn't want to stop. I posted on here and people said it would get easier. I didn't believe them, but they were right!
Now she still does feed quite frequently, but goes longer at night (her daytime feeds are a little closer together then they were to compensate). It feels like it's less draining though because we both know what we're doing. It's not as hard to get her latched on as it was when she was newborn - now if she's crying she knows if I pull her close and tip her onto her side it means milk is coming, so she (usually) stops crying in time to latch. In the first couple of weeks I (or DH) had to pretty much pin her arms out of the way, which was distressing for both of us I think.
If you want to keep bfing, keep at it, it will get easier, I promise. Just take it a day at a time.
But, equally, if it isn't working for you, you don't have to continue. The baby is incredibly important, of course he is, but you are too. And if you're not looking after yourself you can't look after him. You just need to do whatever is best for the two of you 