Wait and see if they ignore your calls three or more times in a row. Be sure to spread out each of your phone calls by at least a day, if not more.
As with calls, try and wait for them to drop text messages at least three times before you jump to conclusions. Once again, be sure to spread you text messages out, as not to overwhelm your ex in the process.
Try ceasing your attempts to get in touch for a while (say, one week). Notice whether or not the step up to get in touch with you instead.
If their social media pages are set to private, it will be immediately clear that they have unfriended you. If they keep their profiles public, you may need to directly check to see if you are listed among their friends.
Inquire to your friends about the change in number. If there is some kind of good explanation for the phone number change, a mutual friend may be able to clue you in.
Try flirting with them the way you normally would (don’t overdo it) and gauge their reaction. See if this happens more than once before you draw any conclusions.
Try to find out if there is something else bothering them that might make them act distant.
Also notice if they occasionally come calling on you for some type of attention or support, but are not there to reciprocate when you need them. This can also mean that they have started a new relationship, but they still come to you in times of loneliness (which reflects poorly on their character).
If they turn down your advances, you may want to simply ask them point blank what has changed.
PDA is more than just kissing. If you see you ex out with someone, try to notice their body language. Are they touching one another? How close are they sitting?
If you suspect something, ask around. Consider asking your ex’s friends directly.
You might also keep an eye out for romantic-looking images on Facebook. You may also watch out for flirty posts.
