Feeling for you OP. I'm going on 5 years. It doesn't get easier, it just gets numb.
Here's what works for me:
1. I'm not on facebook or other social media. That stuff is toxic and somehow filled with fertile women and their perfect children.
2. I don't fake my ability to be present in the lives of my girlfriends who became pregnant and had their children. I don't have pregnant friends or mom friends. Period.
3. I go to therapy.
5. I take Lexapro.
6. I give myself permission to feel WHATEVER, WHENEVER. If I want to punch a pregnant woman in the face or slash a stroller's tires, I don't feel guilty about it anymore.
7. I answer questions honestly and advocated for myself and others with infertility. This includes telling the barely-visible pregnant woman checking me out at Trader Joes who offered, "sorry I'm kind of slow today, I'm pregnant", that it's insensitive to say things like that. And the coworker who told a patient in front of me, "You know why I'm a good nurse, because I'm a mom!". And all the women who say, "How long have you been married".... pause... "Don't you want to have kids??". The more people are educated about this the less and less we'll have to deal with the stigma.
Best of luck to you.