Infertility why?

Just to end from my last post, no we did not take in the 3 more children making it 4 children. I really wanted to but if my husband was against it we both have to be on board. Justin was bumd but hopefully another situation will come. I have to talk about infertility today because I found out one of our friends is pregnant for the second time. On the first try she got pregnant with her daughter and now she wanted another and got pregnant the same month she tried again and just announced to us on Saturday she was. I thought this time if anyone had announced they were pregnant I would be happy for them and not have those feelings I has the first time she and all my other friends announced they were pregnant. I will be 30 this year and almost all our friends have babies and are now rounding me with there seconds and while I still have my one and never was able to know what if feels like to go through a pregnancy. PLEASE PLEASE don't get me wrong at all. I LOVE just with all my heart and would not give that up for anything but that feeling still hits a nerve. She announced it and the rest of the day I had my husband asking me what was wrong. I kept telling him I am fine. My husband is awesome he tries to point out that we have Justin and that is what we always wanted why am I acting like this. I don't know what I was acting like exactly because I just felt like I was walking in a fog.It just hit a nerve when it was announced and I don't know why. I truly and honestly do not want to be pregnant I am over that. I truly am. But that feeling still came back when it was announced like a pit in my stomach that nerve we just struck and I wasn't mad at her and I was happy for her that she didn't have to struggle like I did but it still kind of hurt. To make this go full circle. I know why I couldn't get pregnant because I would never have had Justin. If I never had Justin I don't know if I would have found my way back to God and the church. I have lost him for a while. When my dad was sick I prayed and went to the church for holy water to sprinkle on my dad. After he died a peace of me went to heaven with him that I feel I never really got back and that I am not the same person as I was before he passed and I think that also has to do with I don't have any other family that is there for me but my husband and son and his family. But then again they are his family so if there is any disagreement I need to talk to them because I am upset with my husband there is no one to talk to because we all know what sides they will take and I would never let my son decide. So I felt alone like god took the only person that was on my side the only person that could save me if I needed, the only person that was my dad the one I looked up to my friend. He was all those wrapped in one and that was gone and I felt kind of empty and angry with god. My anger only grew when we tried to get pregnant now it will almost be 6 years and then the infertility was brutal and I felt like I lost some kids when I went through in vetro. It was earth shattering and I went to a very dark place. I didn't do anything bad but my thought were so bad I had to be strong enough to pull myself out of that. I did then the adoption road was some what of a long struggle and frustrating first wanting a baby and none coming to having a 4 year old unexpectedly come into our lives. I am grateful for a lot. This year we decided his adoption was finial we have all his paper work we will baptise him so I started to go to church with him and feel better and feel happy again. I started helping out at church and going to the soup kitchen and helping out there it felt good. Why do I have this nerve that gets struck if I feel I am in a good place and over being pregnant. Sorry getting back to full circle we go to church yesterday and guess who is in front of us, our friends who told us they were pregnant. As we confessed our sins I kept telling god please let this feeling go away I am sorry for having this upset feeling with them and there announcement I just want to be completely happy for them and mean it. Of course I sat with them and tried to hardest to not show nothing was wrong but it sill a little awkward. I don't know why. I wished it would go away. Then the pastor said had a casket in the middle of the church and said anyone ever have an elephant in the room like this one and know they had to say something but couldn't. I was like my goodness what am I to do. I don't want to say anything like that. It would hurt there feelings and they are excited they just started telling people. When we got up to leave I just told them both so happy I was for them and gave them a hug. I don't know if it was the right thing to do but it felt like it at the time. WHY DOES INFERTILITY HAVE TO BE SO HARD.