what should i do ?

maybe you should talk to her and ask her if she has a problem. maybe she has a problem and you are not aware of it. i'm sure that she still loves you. it's just sometimes problems popped out that's why people act different.

Oh my, so I assume that for five years that you've been with her, you suddenly found out that you're in love with her all the time? Bro, we're in the same boat.. The only thing differs is I'm with her for five years.. What can I say? Well, does she know about it? If she already knew and you're thinking that she's not the same anymore then confront her and tell her why does she gives you a cold feet.. That will ease up tensions between the two of you.. Hope this one helps out..

I think you should tell about your feeling rather than consuming it. I think you should also try to know about her feelings to you. Most times people do changes as time changes and atmosphere changes. I think if she really doesn't love or like you as you before I think you should leave her and you should carry with your own life.