snapchat and my boyfriend

So recently I saw my boyfriend added one of his coworkers at his job on snapchat and they are going to the same community college together. On the same day, he decided he’s going to start streaks again. I asked him why, and he said he just felt like it. I asked him with who, and he said the same people from before.

Today I looked and it’s sort of the same people, then there’s the girl he added yesterday. Am I wrong for being upset? Whenever I asked him if he wanted to start a streak with me again, he said no. And all of a sudden this girl he adds on snapchat, and he wants to start a streak with her. I already had an issue of him searching her up a few months ago on Instagram, and when I brought it up he denied it.