Exes that are still in your man's life

So my boyfriend has two kids--both with two different women. Would it bother you to continue pursuing your relationship even though you'll have to deal with it for AT LEAST 14 more years? I know it sounds selfish. He still keeps in contact with both mothers every day due to the kids. And both relationships ended very civil and friendly. So. Would it bother you enough to not think long term?