I'm afraid you've lost your ILR status by living outside the UK for more than 2 years and you can't get it back.
If you want to marry again and move to the UK, you will need to start the visa process all over again. This time though, it will be a longer, more expensive process to ILR - because the visa rules changed in 2012.
To get a new spousal visa you will need to show that your British husband earns at least £18,600 per year (before tax) in the UK and has done for at least 6 months before you apply for the visa.
Also, it will now take you 5 years to get ILR again - a 2.5 year spousal visa, then a 2.5 year FLR(M) visa, and then finally ILR... and you will have to meet the minimum income requirement of £18,600 per year for each visa. For the first visa, only your husband's income can count, but for the next visas (FLR(M) and ILR) you can combine your incomes.