8 weeks old sleeping short stretches

I’m so envious of parents who ask if they should wake their babies up for feed. I’m having the direct opposite issue of baby not sleeping long stretches especially at night. My baby is 8 weeks old and I see often that they could be sleeping longer stretches at least 3 hours now but I rarely get that. Baby is always waking up within 1-2 hours if I’m lucky I get 2 plus hours. I’m so exhausted I don’t know what can I do. I EBF and don’t seem to have issue with supply cause baby is contented after feeds. It feels like he’s a very light sleeper, he doesn’t like to lie on his back to sleep. He only sleeps better when he’s contact napping and lying on his chest. Night times are really hard for both my husband and I. If we could put him down on his back we might be able to sleep better but LO just doesn’t take it well.