Sometimes I think to myself screw them! I know God has big things for my future so when they reject me now when I'm living the good life they will come begging.(
What im going to suggest you did is going to be so-counter cultural, but its what our Lord told us to do.
In Luke 6:31 Jesus says to his listeners,
'Do unto others as you would want them to do to you'. We often take this in the negative and we say 'don't do to others what we wouldn't want them to do to us', but Jesus meant it in the positive. You can see this down in verse 35 where he says
'Love your enemies, and do good, and lend expecting nothing in return'. When somebody treats you so badly, despises you and maligns you, turn around and treat them the way you would love someone to treat you. But why?
3 Reasons, firstly because God did that for you, the bible says before we were saved we were
'haters of God' yet God turned to us and lved us and gave us the most costly gift available (1 Peter 1:18). That's why in verse 36 he says 'be merciful, just as your father is merciful'
Secondly verse 35 says 'your reward will be great', what is that reward? Verse 38 tells us
'Give and it will be given to you. They will pour into your lap a good measure, pressed down, shaken together, and overflowing. For by your standard of measure, it will be measured to you in return'.
Jesus is not talking about what God is going to return to you, he is talking about what your enemies will return to you, that's why he says 'they'. Jesus is teaching, when someone constantly treats you badly and you turn around and give to them, and treat them in love, this is a beyond human response and it will hit them so deep that they won't be able to help themselves but give back to you in extreme measure.
Thats why in proverbs 25:21-22 it says
'if your enemy is hungry, give him food to eat, and if he is thirsty, give him water to drink, for you wil heap burning coals on his head'.
And finally verse 32 says
'if you love those who love you, what credit is that to you? For even sinners love those who love them'. When you show someone love who hates you, they will know this is a love that sinners are unable to show, thus it will testify of God living in you and there is a chance you will save your enemy.