"Forgive my speaking of English, as I am not so premium with it."
Are you proximal with your friends? Hopefully the answer is yes. In my case, the answer is no. What do I mean?
I have just moved to a new place. This means that most of my friends live elsewhere. People I used to see on a weekly basis (or even more often) are now somewhere else. Opportunities come with every move, and so do challenges for those of us who tend to hoard relationships like Jonathan collects "things." Here are a few signs I've noticed in myself that I need to pack up my bags of sentimentality and gallop off into the sunrise of a new phase of life.
Texting, calling, messaging, or otherwise making contact with old friends far more than they reach out to you. Ew. Stop it. Much like Eponine, it behooves you to recognize that without you, their world will keep on turning.
Spending more time on the internet than with people. Honestly, this could probably be true of most of us, but if you've just moved, don't let it happen to you! We all know Facebook is not the place to meet new people. It's a sinkhole of looking at old friends' babies.
Looking for ways to avoid putting yourself out there. "Oh, I'm sooooo busy." "Oh, I hate going out." "Oh, I just took a third job." To be a healthy human, you need to interact with other humans. Preferably, this will happen outside of work sometimes.
Giving up after the first try. You are not the only one with a busy, young professional life! You're not in college anymore and probably can't reasonably expect your new friends to be available at the drop of a hat. Plan those social outings. Plan them in advance. Make them worth your while.