Boyfriend issues I need lady advice.

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My bf and I have been together for 6months and a few weeks but like right after our 6 month anniversary we had a serious talk where I brought up that he never asks me how my day is or was. After that he told me he needed to think alone and wouldn't talk to me for days. Once we talked he told me he wanted a break and I told him that we just need to talk it out and work on ourselves and our relationship not take a break. He agreed to do that. And then said that he loves me. Few days later a girl in my dorm came to me with her tinder and showed me that he had a tinder. I brought it up to him and he told me it was from when he said he wanted a break. What do I do ladies?