Feeling a little discouraged about breastfeeding

My latch is not great and its destroying my nipples. I feel like i am doing everything right but clearly am not. I do the c sandwich my breast, get more of the bottom of the areola in his mouth, pull his head to my breast, if its not perfect i pull his lip down farther but i rarely get a good latch. And since its not a good latch my son will be hungry after an hour or sometimes want more within half hour because hes not getting enough. Ive been seeing a lactation nurse and she is helping and i found a local breastfeeding support group i will be going to. I just wanna cry i have been trying so hard. I guess im looking for some hope, someone else that went through this and then got better. How did you guys handle this.