Hi guys, I look for help and hope I'll find it here

Hi everyone. I'm 19 year old man from Poland. My problem with mastrubation began when I was about 12. Firstly It was just a play recommended by schoolmates. After 2 years of irregular fapping and watching softcore pornography i discovered that I don't fell well with it. Unfortunately it was too late, I guess. And since that time I can't win with my addiction. I have some better or worse moments but my record is only a month without fapping, pornography or orgasm. I rather don't watch hardcore porns, maybe only when have long periods of fapping and I fell really irritable or sth like that. What involves me the most are sex scenes from movies, videos from playboy photoshoots and similar stuff. Maybe two years ago I had to stimulate it and masturbate during watching that but now it's enough for me to watch it and after half or one hour I have an orgasm. So why and when I usually do that? It usually starts with social sites like Facebook, when somebody share or just like some sexy photo or video and I usually wath it and fell really horny after that and it forces me to watch other videos. To be honest I can't imagine my life without Facebook. But it's not the only site. Sexy stuff is almost everywhere and to my mind it's impossible to avoid it now. So why I want to give up it? There are few reasons. The first one is that I waste too much time on it. The other ones are my religious beliefs (I'm a Catholic) and side effects of pornography. And finally I just want to fell free and be sure that I will have succesfull and happy marriage in my future. I date girls sometimes, I'm rather a sociable person, but I spend much time on learning with my laptop and smartphone and I am sourounded with temptations. How can I win with them. Hope you will help me.