When is it my turn?

It seems like everyone I know is either getting married or having babies except for me. Don't get me wrong, I am SO happy for everyone but with everyone's good news, it just reminds me that none of that is happening to me, nor do I know if it will anytime soon and that makes me sad. I know some of it is jealousy and I'm aware of that but this is something I have been thinking about for a while. I'm not getting any younger, I'm almost 25 (which I know isn't old, but when everyone around you is experiencing these wonderful events it makes me feel like I'm running out of time) and sometimes I wonder if it'll ever happen for me. I hope it does (and with a particular person would be nice) and when will it happen. I'm so ready for that next phase in my life and constantly think about what that would be like. Nothing I can do about it, I guess but I had to get it out