There's absolutely zero chance of that buddy. Take it from someone who grew up in one of the biggest shitholes in this country where nobody had a job or a chance, and runs a very successful business in Dublin's most affluent area these days. Ireland's seen the worst of it, and knows that we're stronger for being in the EU. We're also not easily lead by shite like the dailymail and welcomed foreign nations into our country as long as they wanted to work and contribute.
Trust me, Ireland will be the last to leave the EU, because we aren't idiots.
Ireland won't leave the EU because while the UK pay 4bn a year towards it, Ireland gets 1bn a year sent to it.