Ttc and having no luck :(

My husband and I have been TTC for over a year and have had no luck. I am really struggling with the fact that I am not pregnant. This is something that I want more than anything. I don't understand why it is not happening for me. I hope that with time it will happen but I feel like I am giving up hope. It is hard when I have friends that tell me they are TTC and then a couple months later they give me their news and I try to act happy for them.