TTC this past year

All year I've been ttc and I've tried everything but nothing has worked. I've been told by many people that I'll be a wonderful mother and friends have asked me when am I going to start trying. I haven't toms anyone that I've been trying since I fail every month. My fiance and I want a big family. He has a little boy from a previous relationship. I know he wants kids with me. Idk if I should just give up on having a family since it's so stressful on him and I. Does anyone have any suggestions before I give up?