If you want to get back together, the first step should be to find a way to help your boyfriend get that paper back. In order to show that you know you are wrong and show sincerity, you can go around more, find some reliable shops, tell them the process of deleting files, and ask yourself how sure you are to recover. Then, choose a few most sure formal shops and bring your boyfriend to resume your thesis. Of course, if you have the hard disk, you can directly return the paper to your boyfriend without informing him. It should be noted that regular and reliable storage must be selected to avoid unrecoverable files and poor scope.
In addition, I think these very important documents should be backed up on the network disk by now, and maybe my boyfriend's thesis is also backed up on the network disk, but I didn't remember it at the moment. You can remind me appropriately to see if there is any archive on the network side. With or without it, try your best to help your boyfriend recover the paper on the hard disk. This is a good opportunity to show sincerity, and you can't miss it.
Try to change, although the other person is your boyfriend, but you can't be too reckless. Take the paper being deleted as an example, because I don't think my boyfriend will really be irreparable. Even if I was angry, I wouldn't do such a thing. Because I know that if I do this, the other party will not let myself go easily. But a boyfriend will tolerate himself, no matter how angry he is. A boyfriend who has a good temper and loves himself will be afraid and tired. When he thinks that his girlfriend is a person who can't control himself, he is likely to choose to let go. Because a girlfriend is a person who wants to be together for life, not a relationship that can be forgotten once or twice.
I believe that as long as I am willing to admit my mistake, my boyfriend will forgive myself, but I must cherish this opportunity. Show more determination to change. Don't be impulsive, it is inevitable that two people will bump into each other. To know how to control your behavior, you can express your anger, but you can't ignore it after you get angry. No one wants to meet such a partner.