<human>: Could you distill the essence of the text into 1-3 sentences?

I am a 15 year old guy and have been dating a 16 year old girl for one year. I used to be a very outgoing guy with plenty of friends, male and female, but when I got into the relationship all of that stopped. I was happy with that because she was so special and we had a really great thing but now she's become so different. She used to not have a problem with my atheism or counterculture attitudes. Talking to anyone else it would seem extreme and possibly annoying but she's always been happy listening and I'd listen to her to. Now she doesn't listen ever and she doesn't want to talk. I've started hanging out with guys and girls that I did before, I feel like I'm single. And of course, there's another girl now. She's kind of a different girl but should I accept I'm not mature enough for a relationship yet or stick it out?
<bot>: I've started feeling like I'm single and I don't know if i should accept my lack of maturity or try to make my relationship work.