Single parents, especially divorced dads, are often reminded how strong their love for their children is after being separated. One of the conditions that you have to love them through is when they're making memories with someone else.
Either you find progress through the pain, or you don't...
I'm 38 and a single father of two and don't really think of myself as anything other than a dad. Maybe a tinkerer. My background is art and engineering with 10+ years in medical simulation and I've been fortunate enough to have been to 16 countries, so far.
Managing that unconditional love is the most difficult thing I've ever done. Everyone has a subjective idea of what that type of love means to them, but conditions change. Expectations have to change as well. My love stays unwavering. The dreams I had of helping with homework after school, teaching my kids to ride a bike, and reading a book to them each night are far from reach and being fulfilled by another person. To still find happiness in that sacrificial love for my children, is a path of life worthy of attention and one that I'll continue to learn from.
Lead with love.