My friend, who's a relative newcomer to social media, has shared a recent experience with me.

For about 7 months, she's been chatting privately with a guy (he's 36, she's 60). Conversations primarily about shared interests (travel). He introduced other subjects, including sex. Not wanting this discussion, she politely changed the subject. He continued with occasional innuendo.

Three weeks ago, they met for lunch. He was the perfect gentleman, paying for their meal. Both agreed it had been enjoyable. Three days later, he "wished she could join him in (insert UK city name)". They had a brief chat, then nothing for about 5 days. He then posts engagement announcement on same social media, showing his partner's hand and ring.

She wasn't upset by this. Instead it amused her that he could be so elusive. He'd also said he wasn't in a relationship. However, she's said she feels sorry for his fiancee who's blissfully unaware of his late night discussions. Decision taken to unfollow him, deleting their conversations.

This afternoon he's contacted her again, asking if she's okay and why she hasn't been in touch with him. Again, she's deleted the message but doesn't think he'll remain silent.

So, her dilemma is, should she tell him the reason why she hasn't been in touch. Will it give the impression that she was taking their friendship too seriously, or give him a mild rebuke for his behaviour. Another option is to make an excuse about being busy and see if he mentions the engagement.

Your thoughts please!