I wasted 6 years of my life on a guy like this.
Long distance the whole time for us due to him keeping moving with his dad in temp jobs all over the country that also meant working weekends.
Around the 6 month mark maybe, i sent me a screenshot of something and had left a chat with another girl open and had just sent an "i love you" message to her.
Immediately tried to lie, say it was his cousin who was having a hard time, forgetting he'd mentioned her to me before as a girl he nearly dated then found out was engaged a few weeks before we met (also on an anon chat site). Refused to screenshot him telling her that was a mistake, as said she'd gone offline, bunch of excuses etc. Said they almost never talked so i said he wouldn't mind deleting her as a friend then. He grudgingly did after a rant, but the very next day made a new msn account which he decided to just use on his phone, added me and immediately deleted me off his old one so i could no longer see his friends list. Convinced he re added her as soon as he did and kept that account on his laptop so he couldn't get caught out again.
Year after that he went working away in the US for 11 weeks i think it was, at a summer camp. Mid trip he suddenly caused a really petty argument, then disappeared offline for 8 days (i was seriously ill with MH issues at the time) and then made up some story his phone was stolen and damaged and no longer charged and he had to wait to get an external charger. Funny how he never sent it off to get fixed but could upload photos meaning his port must work just fine and he lied.
He also randomly sent me a dick pic mid chat a while after that, he always told me he was super shy and we honestly would never talk about sex, so it was complete shock. Tbh i think he had just latched on me at the start as i was very open about my previous financially abusive relationship the day we met (after a 6 hour chat) and he saw an oppertunity to take over that.
6 years, £700 in gifts from me to him, 0p from him to me.
New years day i confronted him about this and the none appearance of the christmas present he'd voluntarily brought up and insisted on buying me, (now believe it was to get me to send him one, which i did, like a mug) yet how his little brothers girlfirend he was buying all her fave stuff like chocolates, alcohol etc, and taking her on shopping trips, and he didn't reply. I sent one last message a half hour later explaining exactly what it would make me feel if he went ahead with his silent treatment, how i felt worthless to him, forgettable, a nothing, a none priority he didn't care about. He has never, ever replied or spoken to me again, despite having been telling me up to this point he loved me and we were supposedly going to marry some day.
He was also a compulsive liar who pretended to have a brain tumour as his response to me telling him my mum died of brain cancer. Few week later i asked about it, he supposedly had a new scan and was all clear, said it must have been bleeding from a head injury he got in a crash just before i met him, bollocks, they don't mistake shit like that and he wouldnt have been released and would have been significantly mentally impaired if he had brain bleeding, but i didnt ever call him out on it.
Needless to say, i would no longer trust a long distance relationship again, they can lie too easily.