Am i wrong?sorry for it being long(update)

Me(27f) and my bf(31m) went to one of his friends(30f) house after a beach day with her. Everything was going good until a friend(29f) of hers came over. Weve never had any serious issues in the 3 years weve been together. But his friend invited a girl over and she had a debate on a family issue going on . I ignored it because it wasnt any of my business, im not really close to his friend. I seen him pull his friend to the side and his friend told me how he said his friend(30f) needs to understand her friends(29f) point of view and not to keep getting her upset . I thought that was a little weird because he said he just met her and how does he feel so deeply about her family its only five minutes into her being here. Then he brought out a bottle and she wanted to record him taking a shot over and over until she got the perfect angle to post. At this point im just sitting back and watching because their interactions just dont sit right. Everyone wanted to play a game and he right away asked her and she was excited, they played for an two hours staight. Everytime she bent down he was watching her even when she was just talking to her friend.All she wanted to play was sexy red and wouldnt stop singing every lyric, I like her music but to keep shouting out your body parts even when the song isnt playing is ridiculous. When it was time to go she went straight to him and said bye cant wait to play with him again and then everyone else and nothing to me until she got to her car. After i think he knew i was upset and started singing to me and then asked me if i want to start family with him even though we havent had sex in 2 months because he said he gained weight and doesnt feel comfortable anymore. He has told me numerous of times he doesnt want kids until hes 35 atleast. I Havent really said anything to him since and I feel like Im going crazy because am I just imagining what I seen? Were supposed to move in together in a month and I feel like im setting myself up.I dont have any bestfriends but I know a lot of woman here have wisdom , please help . Am I just self sabotaging or was he really not doing anything wrong and just enjoying a time with a new friend. UPDATE: Its been three days since I seen him so i decided to stay the night and we were having a few beers and Im getting ready for bed. Now before i get here i already got it in the back of my mind and I have one foot out the door already , I was just hoping to speak with him and figure out whats going on with us. But 1 AM comes around and he shows me a text from his cousin saying his aunt really needs him and they have a bottle just to come over . IT IS CURRENTLY 6:30 AM NOW! I have work in two hours. I understand family issues but not to come home all night without even a phone call or text is wild. ITS 9 am and hes still not home.