Need advice!

I don’t know what to do... i find myself at 5am not being able to fall asleep and am crying. I have been in a one year and a half relationship with my bf up to this point. We’ve had many ups and downs but recently he has been stonewalling me and i have no idea why. We were out to dinner last Thursday with my sister when his mood suddenly flipped and he became non conversive. I kept asking him if he was ok to which he replied his stomach hurts and couldn’t eat (he had agree to go out just moments earlier). Out of concern I touched his abdomen to see if his stomach hurt in a particular region along with his forehead and he goes “are you dumb don’t touch me” in an aggressive manner. At that point my sister and I were confused and I kept asking her via text if she noticed I did anything wrong to which she replied no. The vibe got awk throughout the dinner and he starts ordering one alcoholic drink after the other. This kept frustrating me because not only did he not communicate what was going on but he was resorting to alcohol as a coping mechanism. I felt very hurt... he ended up loosening up a bit more and talked to my sister with a complete switch in mood laughing and all after finishing his third drink but he continued to ignore me. When we got home he asked where the air mattress was and since it’s was my sisters i told him let me ask her if you can use it. He rolled his eyes and got frustrated - when she agreed I told “you can inflate it now” and I agree I said it with annoyance and he goes “I’m going home I have my own bed anyways.” Then he proceeds to angrily pack up his stuff and leaves. When I called him afterwards to ask if he got home safely he said bye and hung up on me. It’s been 4 days since he’s been ignoring me. I sent a text asking how he was doing and if he felt better to which he replied with a thumbs up emoji. I don’t know what to... I feel really distressed because this hasn’t happened before and my friends keep telling me to not reach out to him though I’m really tempted. I’m not even sure why he’s upset... my minds going all different directions thinking maybe he’s gonna breakup with maybe he’s unhappy and just realized he doesn’t wanna deal with me anymore and this all hurts me very much... I can’t sleep I don’t feel like eating... I would appreciate some sincere advice on how to move forward. I know some Might say this is emotional abuse and that I should consider breaking up but I do care for him a lot and i don’t think I’m at that point . I don’t know if I should reach out for a second time (scared to receive nothing or another thumbs up emoji) or if I should not contact him (but also scared if the silence will last forever and torment me