Starting to weaken... HELP!

I have not had any contact for 132 days now. Him and his new OW although last contacted me 23 days ago. I did not respond and that is when I put the block on my phone. I am tired of seeing them around and hearing about their "happiness." I am feeling like if I take the block off and I hear something... anything from him I will feel better know he isn't all "happy in love" like they are portraying. I KNOW that this isn't a good idea and I have been reading posts like crazy to change how I am feeling.
I have thinking about taking the block off my phone for a few days now and haven't done it.... I hate feeling this way. I have made it this far and actually do feel much better. BUT, every time I see them, it's like I take ten steps backwards. :(
Need some encouraging words today.