How are you this morning, Spaghetti?
I can so relate to those feelings. You're not alone. However, want to say to you a couple of things.
Firstly, not everyone loves breastfeeding, and beating yourself up about it (which you may or may not be doing) can make it even harder. We're set up to feel guilty about so much in parenting, based on what society says we ought to be feeling or doing, but actually what will build the strongest relationship between you and your baby (which must be the most important thing, IMO) is not self-sacrificing, which leads to resentment (as you seem to be expressing in your OP).
Secondly, I imagine that you probably wouldn't feel quite so stressed and unhappy about this if you had a choice. The feeling of being trapped can be suffocating and make everything seem a million times bigger than it is.
Thirdly, it's not the breastfeeding that's tying you to your baby, even if it feels like it is. Babies need their mothers, and they need to be very close to their mothers for the first few months. In our culture, we tend to train our babies to just learn to live without us far younger than they're set up to be, so we see other babies in our culture behaving biologically abnormally.
What you've done by breastfeeding and staying close to your baby is helped to build a really strong foundation for her - you're wonderful! But now it's suffocating you and you still have many months left, although it will get easier as time goes on, and that's terrifying.
The thing is, though, that babies sense when their mothers are tense and frustrated and it scares them. When babies feel like this, they're essentially feeling insecure, and as if they're not sure if they can trust your love and steadiness. When babies are insecure, they cling tighter. Imagine if you were on a steady ferry on a calm sea - you'd be able to walk around happily on it, unconcerned about what may happen. If it started to rock, though, you'd probably sit down and get closer to the deck. If a storm hit and the boat began to feel really unstable, you'd find something to hold on tight to.
It could well be that that is what your baby is doing. She's suckling extra because she's feeling insecure. Unfortunately, it's setting up a vicious cycle. I don't know if this link will be helpful to you, but I wrote it a while ago about older babies who are still breastfeeding. The sentiment is the same for babies of all ages though.
If you can find a way to be at peace with your baby's need for closeness with you, you may find that she begins to pick up your calmer feelings and begins to feel more secure, which will lead to her gradually being more and more happy to be apart from you. But don't push it - the more you push it, the clingier she'll get.
I really do feel for you - it is so claustrophobic when babies are clingy. Two of mine were like that. And it's scary, because we don't want to feel like that about our babies.
Thinking of you xxx