<p>Gardener, I went through almost the same thing about two years ago - thought my brain was going to come loose of its hinges. Almost same scenario, although, D was thankfully already in college. The boyfriend was from our home town. The worst part was that his family was doing everything in their power to encourage and support the relationship, in every possible way. The father was doing everything he could to even push marriage, which as you might imagine horrified me. D said all along she wasn’t serious about him, but, he called her 20 times a day, monopolized all of her time when she was home on breaks, etc. </p>
<p>What finally leveraged the break-up was when the boyfriend traveled to D’s campus, spent some time in “her” crowd, and I - don’t know for absolute certainty but strongly suspect - peer pressure from her college friends and teammates wrecked it. D out of the blue, suddenly, broke up with the boyfriend, and has repeated such an unfortunate choice since. (It was a surprise because I have genuinely liked all of her other dates.)</p>
<p>Therefore, I would recommend you offer to pay to transport the boyfriend to your D’s college, wherever she decides to matriculate. This way, she can look forward to seeing him, and, I would guess that once she sees him in her new environment, she will quickly recognize the disconnect, and she will lose interest in continuing the relationship.</p>
<p>If you stand in the way, or restrict their access, or even just appear to be restricting their access, it’s just going to polarize her more solidly in his defense - and potentially even prolong the relationship - , so, I’d say, get out of the way, offer to pay for a visit or two, and surely once she has an opportunity to really, really see how he fits into her “world” the matter will quickly resolve itself.</p>