<human>: Can you give me the gist of the text in a nutshell?

Hello, I'm desperately in the need of some advice about doing the hard talking without backing off.

I[20/f] want to divorce my husband[31/m] of 2 years, our relationship is causing me a lot of anxiety and draining my will for living. I don't see us being very compatible together and there is some serious fundamental level differences as well. However after bringing this subject to my husband he was completely devastated and unwilling to end our relationship. He begged for me to give us another chance to fix this and make things work. He was very insisting and kinda forced to see me yesterday morning and talk things through. He was able to make me agree on trying, which I regretted instantly when he left back to our home (I'm staying somewhere else). I don't see us being able to make it work(and for example both families of ours are agreeing in this, so not very supportive environment) and since I have been thinking about this a lot I have kind of started to move on already. 

Anyway I don't know how to break this to him since he doesn't get my reasoning or doesn't really understand how I'm feeling. Right now he is thinking that I'm returning to our home after this week and we are going to work on making it better. I want to end it now and start arranging practical stuff and looking for new place but I don't know how to approach it with him and keep myself from backing away again.
<bot>: I want to end our relationship, husband wants to try fixing it. I think it's unfixable. How to break up?