I know him for 1,5 years. Recently he asked me to be together. Although this was not what exactly I wanted I agree in order not to lose him. Now he is really jealous of me and tis is nerve-racking (we live 300km away). I love him and I know that he loves me too this situation is killing me. The sparkle between us starts to fade out.. What can I do to make things better? I need your advice.. please enlight me.

Hmm.. you do not exactly want to be together with him but you still love him?
Do you love him as a friend only? If so you need to tell him.

I know that I don't see him as a friend.. I cannot stand his pressure though I want to be with him

What kind of pressure do you mean? I don't understand really :/

He tell me "do not do this or don't go there or don't wear this dress but where jeans etc

Ehh.. Sorry to say it but you should not accept that, and you are correct in saying no to him, he has no right to tell you what to wear - it only shows one thing - he feels that he is less worth and has bad confidence and that's why he is jealous that someone else will take his place and he tries to prevent it by telling you what to do and not to do, but it's not the right way, when someone tell you what to are allowed to wear before you are even together something just is not right. Talk to him about it and say that he has no right to say that and that he can not control you.

Your still your own person, tell him that and say there might be a future if he loosens up a little