Help needed please!!!!!!!!!!!

[michelle&neo]

Hi all well i just wanted to know if i can block someone for being nosey on my profile as they am stalking me and telling everyone my business as i have had a very upsetting day and i cant even get any advice as this person would just tell everyone and i don't want this person to know anything to do with me has they ant right in the head

any advice please ???????????????????
Thanks xxxxx