Lil' Kim Still In Mourning For Biggie Smalls

Kim -- who was famously close with Biggie -- tells us she'll be honoring his memory at a private dinner in NY with close friends and family members ... saying, "I will never forget him and I will think about him every day until I die."

She adds, "I will celebrate him every single day of my life ... I have endless love for him and I'll be grateful and thankful to him until my last day."

"I love him ... and will never stop loving him."