Is it weird to go away with my stepdad?

I am 20 and recently finished my first year at university. My mother and her ex-boyfriend broke up about eight months ago. I still keep in touch with him, which my mother does not mind. I have known him since I was 12 and he was like a second dad to me. However, my boyfriend of three years thinks it’s weird and that he is using me to get to my mother. Now my stepdad has invited me to go on holiday with him and I have said yes, but since then my boyfriend has been really distant. I don’t know what to do. A step-parent and child will often have formed their own close relationship if they have lived together as a family for many years and it would be a hard loss for both you and your stepdad if you didn’t keep in touch. So I can see why it would be nice for you to go on holiday with him. However, my only concern is that he might have an ulterior motive and want to start a relationship with you, which would, of course, be very wrong. You probably find this idea quite creepy and it might not be the case at all, but do you think that this is your boyfriend’s concern? Explain all of this to your boyfriend, ask him if he is suspicious of your stepdad’s intentions and, if so, why does he think this? More importantly, talk to your mother about it. Does she know of your holiday plans and is she happy about them? Her ex should have checked with her first and if she has any concerns about you going then I think you need to listen to her and cancel. You could also talk to your stepdad and explain that your boyfriend is unhappy about you going away with him and ask if perhaps he could come, too?