Hi! I have been having problems seperating my fingers too. But I think I can suggest some "excercises" to help you!

Okay, so the first thing is to take your strumming hand (most likely your right) and use it to pull your fingers apart while they are bent, without the guitar. Do one space at a time. Hold them there long enough so that you can keep them in about the same position when you take your other hand away. Keep your fingers like this for as long as you can.

Another thing you might try is getting something thick and firm to place between your fingers to keep them apart. Make sure that when you do this, you have all those fingers bent. Leave them like this for a long time.

You could put the firm stuff between your fingers when you try to play a certain difficult chord, and play that chord over and over again, with the stuff holding your fingers apart in just the right position. Do this until you can keep your fingers apart by yourself. Work on one chord at a time.

You might also consider doing warm ups. You know how athletes warm up before a game or practice? They do so in order to losen up their muscles and prevent injury. This helps with coordination. Try playing around with your fingers, stretching them and trying to make shapes and things.

And I am wondering if you know how to type on a keyboard using all of your fingers, without looking at the keyboard? I can't yet. If you haven't learned, maybe learning will help your finger coordination, too. Think of learning guitar chords like learning to type. It's slow and painful at times, but you can learn the coordination.

You might also soak your hand in warm water, to losen things up. And doing so after a hard practice might help your hands, too. I'm sure they get cramped eventually.

The last thing I think you could do is a little weird.. Well... I want you to practice grabbing multiple things at once, but instead of stuffing them in your arms, make each finger grab one thing. Maybe you can get a plastic bag, fill it with something (it could be anything, pencils, a bag of chips, a tissue box, just something that's not too light, but not too heavy, either), and make only one of your middle fingers hold the loops of the bag. Move the other middle finger around, and force the finger holding the bag to stay still. Even straighten out the free finger while you still hold the bag in the other. It will take time, but this might help teach your brain to only send signals to move to one finger or the other, not both. We were all born this way. It's just some of us have learned better how to control our fingers than others.

If all else fails, try stwitching your guitar around so you strum with the hand you usually hold frets with, and holding the frets with your writing hand. Your writing hand may be more coordinated tha the other one, beause it has to do most of the work.

Oh! I just thought of one more thing. It's something I've done a lot when playing around with a pencil in my hand. What you do is get a pencil. Take one of your troublesome fingers, and old it down while all the other ones stay up. Take your pencil, and put it on the outside area of the finger you are holding down, and make sure that the inside of all the other fingers are touching the pencil. Shove the pencil down as close to the base of your fingers you can. Then bend the finger you had been holding down. The pencil will keep your other fingers from being able to bend. Do this a lot. You can even do this with different fingers while you watch tv. Keep doing so until you can bend each finger without the other ones trying to follow the one being bent. And maybe try doing this pencil trick again occassionally afterwards, for practice.

I hope these suggestions are at least somewhat helpful!