Please tell me it gets better

My 10 week old baby takes 20-30 minute naps, but if you hold him he sleeps for hours.

Started cosleeping with him at night even though I’m not comfortable with it. But it’s the only way he and I can get some sleep. I’m breastfeeding and he eats every 2 hours.

Not being able to put him down for naps during the day and cosleeping when I hate it is really taking an emotional and physical toll on me. My baby is really sweet and I know he is still a newborn.. please tell me I’m not alone and it gets better.