The answer to this question is no. There are three types of alicorns, neither living forever, but some living longer.

Born Alicorns

Born alicorns such as Luna and Celestia live a longer life than other normal ponies, by aging one year every 50 or so years, and maturing much faster than normal kinds of ponies. This allows a major advantage in learnign and leadership, by allowing them to remain alive (unless acted on by an ouside force) for long periods of time, and learning very fast. Because they age slower, their minds also learn slower, causing them to mature at the age of 10-11 (which is 1,000 to 1,050 year old). Once matured though, alicorns learn fomr their mistakes very quickly and often don't make the same mistake two times.

Turned Alicorns

Turned alicorns such as Twilight and Cadence are either unicorns or pegasi, not earth poines, that have, through magic, love, or friendship, become alicorns. This takes a lot of effort for that pony and is very rare, normaly happening in that ponies hour of darkess, many times saving that pony or her friends. 

Transformed Alicorns

Transformed alicorns (such as those seen in Fallout Equestria) are alicorns that were once unicorns that were transformed, normally against their will, into alicorns, commanded by a single being or leader, which can make them extremely calm or agressive. If this leader is defeated, many will become friendly and calm. These alicorns learn quickly from eachother, since all mistakes are sent to a leader, who makes sure that they don't make the same mistake again. 

Why Eart Pony's can never be alicorns

Earth ponies, even though containing their own magic, don't contain enough to become an alicorn. Pegasi and Unicorns however, do, but if a unicorn turns into and alicorn, her wings won't be as strong as that of a pegasi who turned into an alicorn, who on the contrary would be lower in magic. 

Can Males be Alicorns

Yes, stallions can be alicorns (as show to us in Fallout Equestria) but, when transformed \, their body takes the shape of a mare. Sure they still have the parts that make them a male, but they have the body desighn of a mare.

Why Alicorns Take Carriges when they have wings

Most alicorns (except Candence) are seen traveling in a flying carrige pulled by the Canterlot Gaurd. This is because Alicorns body weight can't be supported for long amounts of time by their wings. Candence, even though she is an alicorn, was transformed into an alicorn from a pegasi, which means she still has the desighn of a pegasi. Pegasi, for flying reasons, have smaller bodies and hollowed out bones to make their body weight lighter.

Authors Note

Ok, so this pretty much explains alicorns, and if you have any questions just ask in the comment post. UP, your blog responses will be back on Monday because I am taking a small break over the weekend. 

Yes, I know my blogs have been getting long and boring, but they are informative! I hope you enjoyed this, and so one. 

Flutter-on out!

P.S. Sorry for the bad grammar.