1. When you hear their name, you can't help but smile.
This one may be the most annoying. Purely, because it is outward validation to those around you that you're still not over your ex. It's humiliating and embararasing to have such personal feelings plastered on your face for everyone around you to see. There's no more denying that the should-be-gone feelings are there and flourishing. The thought of him or her makes you blush, makes you happy; the physiological response to their love, even if absent, cannot be stopped.
2. Simple day-to-day activities make you think of them.
We've all been there. A casual day of Netflixing turns into some tears and unwanted sadness because the show you only watched together is unfinished and left "to continue watching" much like your abruptly ended but somehow lingering relationship. Everything you see or do has a connection to this lost love. Everywhere you turn, you hear their voice in your head, laugh at something ridiculous, or what they would have thought. You miss lounging around, casual nights in, or getting dressed up for a night on the town with your partner.
3. You know you should be over them by now, but they are all you think about.
Whatever time limit you have deemed in your head as the appropriate amount, it has passed and doubled. Outwardly, you may even go on dates, flirt, crack jokes at your ex or relationship's expense; however, in reality, you are no better off than the day it ended. This may be the hardest to deal with. You feel weak. Pathetic. How has everyone moved on, but me? It's important to remember that we all travel the road of recovery at different rates. And, usually those around you have taken just as long. It's difficult to wrap your mind around a life without this lost partner. You invested so much time, effort, and trust into a relationship that is suddenly broken. There is no allotted time amount to when you should be healed. A lifetimes worth of plans isn't forgotten in months.
4. When your friends ask, you lie and say you're over them.
As obvious as this is, it's our final attempt at denial to ourselves. If you catch yourself on the defense every time your feelings are in question, this could be the ultimate sign that there are some unresolved feelings. The only true way to know you are officially over the past, is to be neutral and at peace with what has happened. When you finally don't feel the urge to fight, either way, you know it's over.
The point we all need to remember is that it's okay to be sad. It's not pathetic, it's human.