My instincts tell me my boyfriend is cheating on me

I’ve been dating someone for eight months now. The relationship has been going smoothly, however a couple of weeks ago I just felt something was wrong with his behaviour.

I don’t know if I’m just being paranoid, but I feel like a friend of mine is secretly flirting with him.

I asked him about it in the nicest, least confrontational way I could so he wouldn’t take offence, and he denied anything was going on.

Since then I’ve tried to erase it from my mind, but I can’t!

It’s a woman’s instinct I guess – it’s telling me something’s not right.