Smoking was a very social activity for me, as well. Especially when I was in college. And it was hard when I quit. I lost friends, because I couldn't go out for our usual coffee dates (which involved more cigarettes than coffee.) But you find new ways to meet people. Find a club you are interested in and join. Strike up a conversation with someone (preferably a non-smoker) sitting alone in a coffee shop. Join a gym. Find a study partner.
It's also important to learn to be by yourself. I had to learn that when I quit. Find ways to enjoy your own company. Take long walks in nature and breathe in that clean air. Read a good book. Take yourself out on dates to movies, restaurants, etc. If smoking is highly social for you, you may want to spend some time in solitude until your quit is strong.
As for boredom, find some mindless activity to pass the time for a while. I played a TON of Wordscapes on my phone when I first quit. It kept the boredom at bay and also kept my hands busy. I also binge watched my favorite shows over and over. I had Bob's Burgers playing constantly, just to keep me company. LOL
Hang out here. That's a great way to pass the time! There's always something going on here at the Train. We are a lively bunch!