Affection problem need advice
I have been in a great relationship for 7 months now (my first long term relationship) I'm 19 years old. We met, became best friends and then decided to enter into a relationship and we spent every moment we can with each other. It has been very healthy so far. We've passed the 'honey moon stage' and dealt with a few small issues, (mainly to do with my insecurities) however, recently I have noticed a lack of interest in sex and any type of affection really, on my boyfriend's part. Our sex life has been great up until about 3 weeks ago and such a sudden change makes me worry. Nothing has changed in terms of other parts of our relationship apart from this. I know couples go through phases like this but I'm worried (probably because of my insecurities) that it's because of me, maybe he no longer finds me sexually attractive, maybe he's falling out of love with me. Before he used to be very affectionate- holding my hand and cuddling me whenever he could, but now there seems like there's an issue. I know it must sound like such a trivial worry but any thoughts on the subject would be helpful. This being my first relationship I don't really know what to expect and I'd like some advice before I confront him (in case I'm making this up to be something bigger than it really is). Has anyone else gone through a similar kind of thing? What should I do?