Age Gap Between #1 & #2

I'm currently TTC, I have one child at the moment who is 6.5yrs old so if I'm blessed with number 2 shortly, their age gap would be a little over 7 years. I'm hoping that the age gap isn't too big..I would love them to be close and not constantly at different stages of life. Itd be so special if they formed a tight bond like I have with my siblings but we are only 2 years apart. Can you share your experiences with an age gap of 7 years plus and if there was anything you did to help your kids form a close bond? Thanks in advance