Feeling so overwhelmed and need to vent😭

Baby #2 is on the way and my first born will be 16 months when the next one gets here. I was so excited about the next one on the way until today when we visited some friends that just had a baby. When i held their baby it upset my son so much! I know it is normal for children to have some jealousy but I’m having a hard time bearing the thought of it. My first born and i are really close. He is a hard core mamas boy and i love it. Just thinking about the fact that i will have less time for him, probably less patience, and feeling like i am hurting him emotionally kills me. I don’t want to wish this baby away but i am starting to regret wanting baby#2. I am going to miss what we have now and I’m worried that he and i won’t be as close.