It's a pretty common feeling to have in your 20s at one point or another. You've hit a point where you have accomplished the main 'goals' you've always known of getting an education and a job, so you start to focus too heavily on things you believe you are missing from your life. Unfortunately your friendship group often becomes the benchmark for these things, but you would likely find each of them are envious of the rest for at least one thing they see themselves as lacking over the rest. You've got your 20s to use as a key developmental time in your life, you clearly haven't wasted yours and got a good degree and job sorted early on. Take your time with everything else, you have plenty of space to make sure you aren't going to settle for anything/one you don't want.