cant cum by myself😭

so like i used to be able to cum without my bf (fiancé) help but now unless he is touching me or giving me oral or penetrating me i cant cum😭 like i tried everythinggg (of course this excludes cheating) but i cantttt cummm is it because we been at it for so long (8.5years)?? i was doing our laundry nd his smell made me so excited i tried to play with myself but i could cum Is this normal im not worried or bother by it but when i told him he laughed so hard he almost peed his pants😭 talked to my ob she said the same happened with her & her wife plz tell me im not just a werido ughhh i hope im not going crzy without him