Is it ok to marry a girl 7 years elder

I have been in a relationship LDR with a girl who is 7 years elder than me. We share good bond but there, some issues arises may be because of age difference. Overall everything is fine, she loves me and I love her absolutely. My family will most likely not let the marriage happen, the reason would be her age and societal stigma. We come from Tier 3 cities, Should I pursuade my family to allow us to get married? If I get married to her, will there be any issue between her and me in future?