I was going to say that but didnt know it was your sister, You do look SO alike!!
Sad times
It's horrid going through that. Maybe if OH doesn't feel anything is wrong, Then a few open chats could solve the issues, Unless its bigger, like the feeling of falling out of love
Me and OH have had our fair share of problems, and have split up for 5 months once, 2 months another time, even got new partners, flings, but it never felt right and we were always drawn back together. Very happy and solid now. Was surprised how much I realised I loved him once I had ended things and moved on, got things out of my system, but we have children so it is different I know. We have been together since 2006 now.
I can't say too much in regards to your situation as I have absolutely no idea, but if you are unhappy, don't stay for fear of being on your own Hun, I did that in one relationship. Was together for almost 5 years from the age of 15 to 19 and I was unhappy for a good amount of that time but was scared of being on my own because I wasn't used to it, being with him from an early age. When you've been in a relationship from an early age, you can miss out on some things and grow up too quickly, then resent the person and start getting urges to get out and live a little. Eventually i got the strength to leave and it was hard staying away, but it got better and I became strong and happy then, once I learnt to be happy just as me. Low confidence plays a huge part in that, finding it too hard to leave a relationship you don't want to be in. Not sure if that's you though like I said
Hopefully in your case, if thats what you want, a good open chat and working at the relationship will help, and things will be ok, better even. That can happen too, like me and OH now. I don't know. I'm sure you don't want me talking too much on a forum dishing out personal suggestions anyway
Either way I hope you will be ok and find the answers and solutions you need, It's not nice going through these times and i am here if ever you would ever like a chat, as private as you like
xxx