How can I teach an 18 year old girl to ride a bicycle again after she has stopped riding at the age of 7 due to crashing into a tennis net and getting scared about cycling. She's 1.6 m (Approx 5' 3"). She's scared of getting on the bike and is scared of falling off. Finds it hard to balance.

How can I also get her over the fear of crashing on a bicycle?