Sarah, keep on praying and never give up, GOD is in control!! You are doing a phenomenal job with your boys :0) I have two boys as well (11 yrs. and 7 months) and both have different dad and none of theri father are in the picture but I am hanging on to GOD and I know my boys have the love of GOD :0)
I too am a single mother of a 5 year boy and I went through the same thing when he first started daycare. I felt guilty, and sad for him, especially when father's would come and pick up their children. But I want to tell you that God IS ENOUGH! It will be hard at first, but remember that God only wants the best for you and your children always. Perhaps at this moment their dad would not be the best influence in their lives, maybe in a few years he will wake up and decide that he wants to be a better father. We don't know the answer to that, but what we do know is that God has our back! :) He will be our comfort, our strength and source of peace! Just keep reminding yourself that, yes God does have a wonderful plan for you and your boys and the enemy also has a plan. Take heart, stay courageous and keep asking God to give you strength to go through these days. I know when your boys look back, and understand they will so proud to call you their mother!
Take care sister!
I've been a single mom since my boy was 3. He's 12 now. He see's his dad, and shares time with his dad and 2 step-brothers (his dad's boys after we were divorced). I know being a single mom is not an easy life, but with God's love and your family around you and your son's father's family pouring their love into your boys, they will be fine.
Sometimes it takes time for some fathers to come around; some do and some don't. But as long as you're there for them, they KNOW in their hearts they are LOVED!