Quoting *Mac and Keagan's Momma*:" So my seven and a half month old has zero interest in solids. He puts it in his mouth and gags on it. ... [snip!] ... advice? I have tried rice cereal with breast milk. Sweet potatoe with breast milk. Banana. Anything and he just isn't into it."
my daughter was like this.
she wasnt early (actually 6 days overdue) and she refused solids until 8 months and even then she would only open her mouth for the spoon, but spit out the food. didnt matter what we offered.
she didnt really eat solid food until she was a year old. she was pretty much only nursing at that time.
and the amount your little guy is nursing - sounds like the 6/7 month growth spurt, so completely normal.