You know it's a real thing. When I feel my kids are rejecting me, I try and do the following...
1. Feel the emotion...whether it's anger, sadness or a plain ole' pity party.
2. Then let the emotion pass.
3. Try my hardest not to take it personally.
4. Remember what I was like at their ages. It really helps!
5. Try and let it go and get busy doing something else...anything else.
6. Still ask for their time, phone calls/facetime, etc. Even if they say no...they may also say yes.