I have been in relationships before but the reason I ask this is because I never got this intense feeling before, not the first time seeing my ex for example, there are plenty of hot chicks at my job and while yes I think "Man shes really hot!" I dont get some crazy feeling like this, anyone ever feel like this?
Every time I see her I wanna talk to her but I get nervous
Hate to say it man, but I think what you have is simple lust. Can that turn into love? Absolutely, but you're gonna have to get you know what off your mind first.
When you talk to her, talk to her the exact same way you'd talk to a friend. Don't talk to her in an attempt to ask her out, you would only be talking to her for her appearance, because you like the way she looks and want to go after her. Instead, try pretending that the attraction doesn't even exist, and become friends with her, see if there are any common interest or common belief systems. If you enjoy spending time with her as a friend, then let it naturally develope into a relationship.
In other words, let everything happen naturally. Realize that she is her own being. A living person with her own heart and soul, feelings and dreams, just like you. She's not someone to be oggled over by anyone. Love is a wonderful thing, and there's nothing wrong with having a physical attraction toward someone. That's perfectly natural. You just have to realize that chasing someone for their personality and spirit comes first, before any sort of physical interaction.
Good luck and I wish you the best.