Why is it hard to get over your boyfriend who broke up with you three months ago after a four-year relationship?

Because you had good memories together before things got bad. You both were once in love. No one likes to feel rejected and lose in love, but for most of us we can remember at least once in our lifetimes that one lost love. I know I can. Most of us go through a grieving period (not unlike the grieving for someone that is lost to death) because in a way your situation (and many like yours) is a source of death of a relationship. There is no length of time when it comes to grieving, but it's all up to you. You can sit there crying, listening to songs that you both listened too; hoping he comes back into your life or wondering what you did wrong and why he left. Sometimes people just fall out of love with their mate and it's nothing the mate did wrong. I hope soon that you realize just how strong you are and that there is NO ONE worth making you this sad for this long and you start circulating with your friends and then start dating again. Get mad and get going. Realize that he's not thinking of you and is out having fun, so get mad and decide that you are no longer going to sit around mourning for this guy and again, get out there and start having fun with your friends because there is that special someone out there. I look back (many moons ago) at different guys I use to think I loved with all my heart (at least 2) and realize I was young and didn't love them as much as I thought I did. If we hadn't broken up and I hadn't been stupid enough to get married to one of them like I did (ending up in divorce) I wouldn't have met and married the wonderful man I am married to now. Life has a way of twisting and turning, but thankfully most of the time things work out well even though we don't always like the path we have to take to get there.