are any mamas still ONLY breastfeeding?

i feel like such a horrible mother because i don’t give my son baby food/solids everyday. he likes some more than others, but doesn’t show that much interest in eating solids. he’ll eat maybe half a jar. i kinda gave up and just give him breastmilk now, and some solids. he’s a healthy boy, 8 months and weighs 25lbs. please give me advice!