u/irelanding

Hi, fairly new white belt with a few months of experience here. To preface, I love closed guard and can usually work a bit from that position, but recently I’ve been having issues when rolling with people bigger than me (which is everyone since I’m ~5’2 120lbs). They just lean back and I’m in the air. Grabbing their head and pulling doesn’t really do much either.
Would love some advice :)