Ok, maybe this will help. The number of friend I have who are part of a couple not including family. 2 (4 if you count their partners) number of single friends I have 12 or so.
Now I am in a relationship, less than a year, single for the previous 8, the number of couple friends is increasing. The OH and I live in different towns atm, we can't see each other as much. Many of these new friendships have formed just through me and the OH hasn't met them yet.
I don't think that is a coincidence because in the last 9 months my personality hasn't changed, neither have my hobbies. I am still out going, talkative, still wear the same clothes. The only change is I now have a plus one.
A few more examples in those 8 years of being treated badly just for daring to be happy and single.
- meeting up with an old friend who moved away from the town I now live in. He visited with his children. We met up to take both our children to the park. I gave him an open invite to come over for lunch the next day (lots of other people were coming). His wife kicked off and forbade him to visit for lunch because I was single.
-Being told I could not go to a gig by now SIL. I had bought tickets for the gig months ahead before the stag was even planned. It wasn't like I was going to crash the stag and do 'crazy single lady stuff'. This instance I told her to jog on and went anyway. It was a gig not a private party.
- The countless parties for kids I have not been invited to even though I have a child.
-The chap who wouldn't let his fiancée (my closest friend) out with single girls 'because they are a bad influence' Apparently my single status meant my knickers were permanently round my ankles and it was an incredibly contagious affliction 
- The married friend I have who will not let her husband go to work events without her because she is suspicious of any woman. She has never left me alone with her him or let him drop me home If I have needed a lift.
I really wish I could say things have stayed the same since meeting the OH and If it had I would hold my hands up and go 'yep, clearly its my personality, fine. I can handle that' but the truth is it isn't me.