Broke up after 8 years

 This message is really long but need advice I'm heart broken.........So I have been with my boyfriend for almost 8 years it would have Been our anniversary in January. I've been with him since I was 16 I am now 23. We both lost out virginity together and we were going to have a baby together. But I miscarried and we were both very upset about it and we agreed to have a baby when the time was right. We moved into a apartment together last year in November around the time of thanksgiving and Black Friday. We were trying to have a baby again . We had to move out of our apartment and back in with our parents because we could not afford to live together. We had agreed to save up and get a place ASAP. Before we had moved out he was going out to party's a lot and I allowed him to as long as he was safe because he is still young and I didn't want to take away his youth . We moved out this October 3. He said he wanted to take a break I wasn't happy about it but I thought maybe he just needed time to be young and go with his friends. He said he did want to try and work it out with me still and if it was ment to be than we would get back together . I met him yesterday at a park and he told me he started talking to another girl he meet at a party through his friends. My heart broke and it's still hurting every minute. He says he is confused and doesn't know what he wants. He told me he has been talking to her for 2 months and we have not lived together and been together for one month. He says he really loves me but I feel like if he really did he wouldn't have been texting her when he was still will me. I'm so heart broken I spend all my time with him after and before work. My best friend was there for me last night and said she would help me through it today but she hasn't answerd, called back, or text me . I really need advice what to do.