@Marine,it does not necessarily mean that the lady is seeing someone else (there is a possibility she is) but there are key things you need to note
1. A lady at 18 and the same person at 26 are two totally different people,infact strangers,as one grows up and matures,priorities change,likes and dislikes change etc.
2. The other factor here could be a change in lifestyle,wen i was 18 i didnt hav a job,but at 26 i do have one,am able to take care of all my needs etc,this matters too,especially if u were the one taking care of all these.
3.The time you have taken to make that decision about marriage is questionable,personally i knew someone for 8 yrs and in those 8 yrs i hadnt gone to see his parents officially,i only visited his sick dad in hospital,met one of the bros and one of the sisters,a time came i had to make a choice,go on with a r/ship whose direction i wasnt sure i know or move on,start afresh where i could see direction.
4. Distance is the greatest enemy in any r/ship,it could be the one working against you,find a way of spending more time together if possible.
5.At 26,believe me every one of her high skul n college friends are wedding,left right center,hurry up man.
The real measure of your wealth is how much you'd be worth if you lost all your money. ~Author Unknown