Maybe Cressida Bonas is not cut out for the royal lifestyle after all. Reports say the prince is as convinced as ever that Bonas is the girl for her. However it is the pretty blonde who is not so sure, said to be uncertain that this high-profile romance can actually last a significant period of time.

Although it seems the royal romance is heating up in the streets of London, things are not as certain behind closed doors.

An insider talks to Mirror saying, "Harry is quite open about his strong feelings. Cressida, I think, still needs to be convinced."

As with any other famous couple, there is constant speculation about trouble in paradise. This royal relationship is no different, including reports that tell of Prince Harry's alleged interest in Oscar winning actress Jennifer Lawrence.

According to the source, problems stem from Bonas' end not Harry's. Although the 24 year old dance student is said to "love spending time with Harry", she is doubtful of the relationship's survival if the prince's royal responsibilities will keep them apart most of the time.

"Cressida may be seen as a young, fun-loving blonde but she is actually older beyond her years," the source reveals. "With this maturity comes an understanding of what a serious long-term relationship with the prince would mean. She is fully aware they would spend a lot of time apart."

In the span of their relationship, the prince has been away for a significant part of it including a stint as a pilot in Afghanistan and a wild Las Vegas trip that was said to have caused a rift between the pair.

Reports that party-loving Prince Harry is set on another trip to the United States may have also contributed to Bonas' second thoughts. After all, a bevy of Hollywood beauties is sure to be waiting across the pond, including Lawrence and bombshell Kate Upton.

Still, fans of the royal couple should not fret too much. Although she has expressed uncertainty about the future, Bonas is not about to break the prince's heart-at least right now.

"Cressida has no intention of cooling her relationship with Harry, she is just taking it slowly," the source concludes.

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