Trying to figure things out.

My boyfriend and I… he broke up with me after two years on the 18th of December because of a list of things I was doing and didn’t realize because he never told me. I feel horrible and we are working things out we are back together both feel heartbroken because it was over WhatsApp and then I video called him and begged him not to and he was an emotional mess and had been crying for days before. My point is we both love each other and decided we couldn’t actually throw two and a half years away or each other for our unique sides and I guess im just asking how do you forgive someone who loves you and did something like that to you but because of you and advice as to how we would feel comfortable in bed and not awkward but happy to see each other. Does anyone have any couples building advice or advice? Sorry to be asking something that sounds silly…