break or breakup?? HELP

I have been with my boyfriend for 3 and a half years and it's been great, i've always been happy. But lately we have been arguing over silly things and i get annoyed and an attitude easily. So we decided to take a break. It's been a couple days and my feelings have been so back and forth. one moment i want to be with him because i love him and in the next i'm questioning myself if i just want to stay because of the comfort and scared of change. He is so close with my family and the godfather of my niece which makes it harder. I don't know what to do. We spoke today and decided i need more time so we called it and broke up. I told him i just need more time to figure it out. I am a mess, not eating throwing up having such anxiety. i know if i stay with him something have to change because we were legit together everyday and he basically lived with me for a year and recently moved to his own apartment. My friends think that could have triggered all this. I want it to work so bad but my feelings are so back and forth. Any advice or suggestions?