How do I get over my annoyance with my boyfriend's ex?

So, I’m dating this guy with 2 young children that he had with his ex-girlfriend. I knew what I was signing up for with that, that she would always be around and a part of his life. But she calls him every single day. If he doesn’t answer the phone right away, she calls repeatedly until he answers, or calls her back. She doesn’t necessarily call to discuss the children, she calls him and asks him to do little favors all the time. I’m just not sure what to think, I think it’s great that can be civil to each other, and even get together for outings with the kids, but I’m sick of hearing her name, and waking up to her repeated phone calls that really aren’t that important. Should I bring this up to him? I also feel little tinges of jealousy when I hear him on the phone with her, especially when he’s laughing, or if he mentions something they did together. They were together for 5 years, she broke it off with him, and he still loved her when him and I first started hanging out. Can anyone give me advice on how to look at this situation? I’m kinda mixed up, because I want what’s best for the kids, but I’m so annoyed by her it’s affecting my relationship with this guy. Help?