Keep thinking like that man. I'm going through a very hard breakup myself, not because we have kids or anything, but because it was my first real relationship. We were together for a little over 3 and a half years and I didn't really tell her about my problems. When she found out about them I felt ashamed, but felt way too comfortable that she was okay with it and just told me to get some help (after a very shameful fight). I started drinking and things got a lot worse. I lost her and we still kind of talk. She was fucking amazing and the things we had together was like no other, but the thing that has been good about this breakup (it's my first literal relationship) is that it's been extremely civil. Don't try to one up her man, I started trying doing that in the beginning, but it ended very badly and I embarrassed myself and gave her the advantage of being the better person. She just recently contacted me and I'm in a better place and it's been amazing. I'm not going to say I don't miss her because every night I still dream of her, but it gets easier man! Especially if you start doing things that you use to do before you met her. My thing was music, when she first left me it was hard to listen to stuff because I just wanted to be alone, but I'm getting to my old self and discovering bands like I use to. I got her into a lot of the music she listens to now. Just don't fall to alcohol or drugs, I'm very lucky to get a huge promotion at work right when this breakup happened. I think I would have fallen back on the the stuff I use to do before I met her, not alcohol but things I'm glad I never got caught with. I probably shouldn't be giving advice since I just went through my first real breakup, but I just want to say that some things that people have told me and have helped me through this painful shit is, "no matter what, don't try to be the better person in the breakup. Forget about who fucked up and just leave it at that. " and "Start doing things that make you happy, not to prove your ex that you've forgot about this breakup, but because in life the only person you should worry about is yourself!"
TL;DR going through my first breakup (3 1/2 years) and it's getting easier. It's fucking hard, but hey if I'm getting though it, I know you can too!