What does this mean and what can I do?

So my boyfriend cheated on me last summer and was always hanging out with another girl. This summer I been trying to hang out with him and now I get “I’m busy” and he goes hours without texting. I’m not a insecure person but he would go hours without texting last summer but the whole time he would be with somebody else. I don’t know I just need advice for this summer.
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Edit: we decided to start back over from the cheating but I’m still just on edge on a bunch of things
What does this mean and what can I do?
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