It couldn't hurt to see a therapist. maybe it would help. If you feel like you want to talk about it with someone, then that could be beneficial to you in some ways.
In my personal experience and dealing with other people, I don't think you ever really "get over" feelings of loss, you just come to accept them as part of your life. And sometimes it's bad and other times it's not so bad. Maybe that's not what you want to hear, but that's all I can say.
It seems to be human nature to focus on the negative, but I think that if you can find some good things and try to keep those in mind that it helps.