wa Alaikum asSalaam Warahmatullahi t3ala Wabarakatuhu, I can relate to what you mentioned as I often go through the same thing. I think it's more important to make sure you protect yourself from sin and then worry about da'wah. I realized these type of friends respect you for being "religious" but at the same time are not "into" religion so much. If these friends are keep you from getting nearer to Allah ta 'ala or even more importantly, make you slip into sinning, then you should slowly cut off ties. No one is perfect but we all have to try our best to attain the pleasure of Allah ta 'ala. It's more important to keep ties with Allah ta 'ala than these friends who somewhat reject Him. May He guide us all.