<human>: I've been dating my current (and first) bf for a little over a year now. However, as the title says, we're both going into our last year of undergrad, so as time goes on, the end date is becoming more and more imminent and I don't really know how to react to it. 

It's still uncertain where both of us will end up, but we're both intending to take the grad school route and go to the best school that will fund us. But as time goes on, I keep getting this idea that our whole relationship is meaningless and silly, because he's going to break it off with me as soon as he gets into a different school than me.

I realize it's silly to worry about something like this a year down the line and probably me being overly clingy in my first real relationship. But, not taking this into account, everything with him is better than I could have ever imagined! I just think sometimes when he mentions a school he wants to go to thats really far away (or even in a different country) that leaving me would be easy for him and that it would be better to break things off sooner than later. (I have no intentions of breaking up with him at all though). I'm trying to take a 'que sera, sera' approach, and just enjoying the time we have together now...

Can you summarize the given text in a few sentences?
<bot>: My bf of the past year and a half are graduating college this upcoming year and I don't know how to take the imminent expiration date on the whole ordeal...