My ex-friend bought an abused & neglected horse. Of course the horse didn't want anyone riding him & would run off in fear & do tiny tiny bucks, My exfriend & I came up with a good idea, we would remove the saddle & blanket & my exfriend would hop on the horses back while I held an extra rope attatched to the halter (no bit was used for this). We would do this for hours everyday until the horse stoped trying to run away, which took a few month... but was worth it... a year later she sold the horse to a younger shorter owner & the horse was good for that owner too...

if u don't want to go bareback then atleast get someone to attatch an extra rope to the halter & control the horse for u... u'll feel more at ease & relaxed, remember when u get nervice the horse get even more nervice