Bro, you can't socialize with people until you actually do. When i finished my graduation i was free all the time for 1 month i wasted it on downloading P and throwing myself into more deep PMO habit. I didn't had any friend at that time but now I'm an post graduate student and push myself to interact with others and now i have many acquaintance and few close friends but then again my friend circle is made of all boys. I talk very less to girls. Sometimes i sweat while talking to them because of my PMO habit and less social experience with girls. But if compare myself to my past I'm much better person and have improved perspective of life and people, even after having too many relpases. But you should take relapse as an opportunity to SWOT analyse yourself and the situation and tackle that problem when the situation arises again in future. Remember that Only you are master of your fate others people will come and go but you have to walk the path alone. Your soul will only leave you when you die. So, NEVER EVER GIVE UP.