Sunshine notcool and 30something so sorry things have been so difficult for you all. I do think there is a 3 month 'milestone' for relationships where reality sets in and sometimes one party ends the relationship, or there is an incident which causes the end of the relationship.
Cassettes if I met a guy and we slept together I would be upset if I found out he had a FWB and had not told me. I think that is a learning point for me to make sure that I ask a very explicit exclusivity question before I ever dtd with someone. I have met someone I like although it is very early days, so I am listening to what everyone is saying and what I am taking away is that clarity of communication is key. I totally get how much of a passion killer it can potentially be if you have to ask someone a checklist of questions before you dtd so I think I will try to have a conversation with my new guy well before we get naked together. I know that he has been single for 18 months, but of course that doesn't mean that he hasn't dtd for 18 months.
And I am going to insist that we use condoms as well. I asked the last two guys that I slept with and they point blank refused to use condoms, on the basis that they were 'clean' and they implied that I must be a bit 'flighty' if I wanted to use them. I got guilt tripped into having unprotected sex because I felt embarrassed about insisting that we used them, and I felt judged for asking. I actually went for a full STI check-up today and was talking to the doctor about this. She was very sympathetic and said that it was less easy for an older woman to insist on using condoms as we can't use the excuse that we are worried about getting pregnant. She did very nicely impress on me the need to stand my ground with confidence, and I now have a bag full of condoms and sachets of lube 
Do any of you also have problems getting guys to use condoms, or have I just been unlucky/weak? Just to be clear, I am going to insist on it from now on.