Trying to nurse a sleepy newborn!

Hi everyone! My 2 week old son falls asleep as soon as he latches on... both my husband and I at the same time are poking and trying to keep him awake with no success. However as soon as I take him off, he's awake and will take his formula bottle wide awake. I had to start supplementing because he wasn't getting enough from me. I also pump in place of nursing at times, especially during night time feedings since its such a big ordeal to nurse, bottles are just quicker.

Any advice on how to keep this little guy awake?? I'm thinking I should stop pumping all together and only get him breast milk by nursing to get us both used to it?