Sibling troubles

So I have a 18mo and a 7week old. At first my oldest just ignored the new baby but now nearly 2 months in I think hes realizing this little invader isnt going away. We are starting to have serious attention and jealousy issues. I make a point every day to set aside times to spend with just him which he loves but as soon as I start holding pr caring for the baby again he gets upset. I've tried including him in taking care of the baby but at just 18mo it's hard.

It breaks my heart when I'm nursing and hes sobbing just wanting his mommy. I know we will get through this but it definitely hurts my heart for the time being