please lord let me know is it your will for us to be married or not ?

If you have to ask God if it's his will for you to marry that person, then you shouldn't marry them. For when it's God's will you know this is the person for you, and will love them as you love yourself. You will not have any doubts as you seem to have now. I feel sorry for that person if you marry them feeling that way.

Lord give this person a very clear answer either way so that both people can be free in You to be together or apart. Let this not go ahead if it is not of You - but bless it greatly if it is.

dont you think it is a good idea to ask if it is Gods will to merry someone or not?

Proverbs 16:3
Commit thy works unto the LORD, and thy thoughts shall be established.

Are you confused, and do not know what to do? Are you overwhelmed? Such painful doubts are the result of losing your peace in the LORD. But it can be easily recovered, if you commit your works to Him. He will settle, comfort, and strengthen you (I Pet 5:10).