Sorry you're struggling. I definitely believe time heals, and your feelings are natural. It's so hard with breakups because we've all been there where we want to just be completely over that person, but it's a process that can only happen with time. That being said, besides giving yourself time, there are definitely things that you can do to help with the healing process.

For instance, think of hobbies or interests you can do that help you relax and clear your mind. It's good to have interests you can do with people, but also things you can do by yourself as well so that you can cope with being alone at times, without feeling the loneliness that often follows a breakup. Remember to watch out for unhealthy ways of coping so that you do not fall into those patterns.

Your lack of confidence is definitely something that will improve with time, as long as you accept it being a process that does not happen overnight. You broke up for a reason, so always keep that in mind, and remind yourself of why the relationship wasn't working so you can stay optimistic. There are people out there you'll be more compatible with. Stay busy, safe, have fun, do things that are relaxing, talk about your feelings with someone you trust. Focus on yourself during this time, and everything will fall into place. Best wishes.