When you finally start shopping, it can be so easy to get swept up in the romance of it all (and believe me, jewellers will us this to their advantage). Ignore any "you're worth it" cliches, and stick to what you can afford. Don't try on a £3,000 ring if you've only got £300. You're not worth it if you have to sell a kidney. Have a budget, haggle if you must, but never forget that being in love is not a good reason to get into debt.