I've got DD who is 4 in June and we've been ttc #2 for almost a year. Had a mmc in February, and just got another BFN this morning, and with every month that passes I worry that by the time I might eventually be able to give her a sibling the age gap will be so big they'll grow up leading completely separate lives. 
Does anyone have any encouraging stories of big age gaps, whether it be among DC or with your own siblings? Even if they don't play much together as children, is it still possible they'll be close later on in life? I'm just feeling really down today so would be nice to hear big gaps aren't all that bad...