I really can’t

I’m talking to my ex boyfriend again. It’s been since July that we haven’t said a word to each other. Mainly bc I was at basic training. I’m hurt. So I came home in sep-10 oct. we didn’t talk I actually deleted him off snapchat because he was with another girl and I thought I’d help me get over him. Well long story short I’m home again. And I added him back on sc. he messaged me asking about how I was and all that. We both started talking about sex. Idk why but we just started. The thing is I’m probably going to hang out with him in December when I come home for Christmas. He’s in the military as well and the only reason I’m not hanging out with him rn is because he’s in Cali for a few weeks of training. I’m still in love with him. I keep coming back to him. Or I guess fate just wants us talking or some shit idk. But my feelings are so freaking strong for him and they won’t go away. We won’t talk and then bam we’re back talking again. Never fails. Idk what to do anymore. Also he doesn’t know that I fell in love with him. And I really want to talk to my best friend about it. But she doesn’t want me talking to him.