Send my friend a card to try & rekindle our relationship but did i do the right thing?

Hi my best friend of 10 years grew apart approx 5 years ago and i have been thinking about her ever since. I miss her so much and my life does not feel complete without her in it, no matter how many new friends i make no one ever comes close to what she means to me. We are now both 29 years of age. We stopped communicating really due to me starting a new relationship and moving away. I cant stop thinking about her and i have done since we first stopped being close friends. I have just posted a "thinking of you card" to her and i have explained in it that i have missed her for years and i have given her my mobile number.. and ... i just am wondering have i dont the right thing? i am now afraid i have made a complete fool out of myself and she might show it to other people etc. Was this an ok thing to do? Would anyone out there have done the same thing? Honest answers please guys! I have no one else to ask....