i am analyzing some data and i found p value=0.1913 so it is statistically non significant, but the correlation value r= 0.8075, which indicates strong positive correlation.
What was your N? If it is very small, then you could have a high r-value along with a high p-value. For example, with only 6 degrees of freedom, r = .80 would be non-significant for both of the commonly used alpha levels (.05, .01).
Correlation is a measure of strength of co-variance or association. P value is a measure of probability of a correlation of this size under the conditions of sampling. AP value of less than 0.05 suggests that the results are inconsistent with the null hypothesis. But why on earth are you using the null hypothesis significance test anyway? It is a bit 'old fashioned'.